https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
final class com.google.common.collect.CartesianList<E> extends java.util.AbstractList<java.util.List<E>> implements java.util.RandomAccess
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.collect.CartesianList
  super_class: java.util.AbstractList
{
  private final transient com.google.common.collect.ImmutableList<java.util.List<E>> axes;
    descriptor: Lcom/google/common/collect/ImmutableList;
    flags: (0x0092) ACC_PRIVATE, ACC_FINAL, ACC_TRANSIENT
    Signature: Lcom/google/common/collect/ImmutableList<Ljava/util/List<TE;>;>;

  private final transient int[] axesSizeProduct;
    descriptor: [I
    flags: (0x0092) ACC_PRIVATE, ACC_FINAL, ACC_TRANSIENT

  static <E> java.util.List<java.util.List<E>> create(java.util.List<? extends java.util.List<? extends E>>);
    descriptor: (Ljava/util/List;)Ljava/util/List;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=5, args_size=1
        start local 0 // java.util.List lists
         0: .line 39
            new com.google.common.collect.ImmutableList$Builder
            dup
            aload 0 /* lists */
            invokeinterface java.util.List.size:()I
            invokespecial com.google.common.collect.ImmutableList$Builder.<init>:(I)V
            astore 1 /* axesBuilder */
        start local 1 // com.google.common.collect.ImmutableList$Builder axesBuilder
         1: .line 40
            aload 0 /* lists */
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 3
            goto 7
      StackMap locals: java.util.List com.google.common.collect.ImmutableList$Builder top java.util.Iterator
      StackMap stack:
         2: aload 3
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.util.List
            astore 2 /* list */
        start local 2 // java.util.List list
         3: .line 41
            aload 2 /* list */
            invokestatic com.google.common.collect.ImmutableList.copyOf:(Ljava/util/Collection;)Lcom/google/common/collect/ImmutableList;
            astore 4 /* copy */
        start local 4 // java.util.List copy
         4: .line 42
            aload 4 /* copy */
            invokeinterface java.util.List.isEmpty:()Z
            ifeq 6
         5: .line 43
            invokestatic com.google.common.collect.ImmutableList.of:()Lcom/google/common/collect/ImmutableList;
            areturn
         6: .line 45
      StackMap locals: java.util.List com.google.common.collect.ImmutableList$Builder java.util.List java.util.Iterator java.util.List
      StackMap stack:
            aload 1 /* axesBuilder */
            aload 4 /* copy */
            invokevirtual com.google.common.collect.ImmutableList$Builder.add:(Ljava/lang/Object;)Lcom/google/common/collect/ImmutableList$Builder;
            pop
        end local 4 // java.util.List copy
        end local 2 // java.util.List list
         7: .line 40
      StackMap locals: java.util.List com.google.common.collect.ImmutableList$Builder top java.util.Iterator
      StackMap stack:
            aload 3
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
         8: .line 47
            new com.google.common.collect.CartesianList
            dup
            aload 1 /* axesBuilder */
            invokevirtual com.google.common.collect.ImmutableList$Builder.build:()Lcom/google/common/collect/ImmutableList;
            invokespecial com.google.common.collect.CartesianList.<init>:(Lcom/google/common/collect/ImmutableList;)V
            areturn
        end local 1 // com.google.common.collect.ImmutableList$Builder axesBuilder
        end local 0 // java.util.List lists
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    9     0        lists  Ljava/util/List<+Ljava/util/List<+TE;>;>;
            1    9     1  axesBuilder  Lcom/google/common/collect/ImmutableList$Builder<Ljava/util/List<TE;>;>;
            3    7     2         list  Ljava/util/List<+TE;>;
            4    7     4         copy  Ljava/util/List<TE;>;
    Signature: <E:Ljava/lang/Object;>(Ljava/util/List<+Ljava/util/List<+TE;>;>;)Ljava/util/List<Ljava/util/List<TE;>;>;
    MethodParameters:
       Name  Flags
      lists  

  void <init>(com.google.common.collect.ImmutableList<java.util.List<E>>);
    descriptor: (Lcom/google/common/collect/ImmutableList;)V
    flags: (0x0000) 
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // com.google.common.collect.ImmutableList axes
         0: .line 50
            aload 0 /* this */
            invokespecial java.util.AbstractList.<init>:()V
         1: .line 51
            aload 0 /* this */
            aload 1 /* axes */
            putfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
         2: .line 52
            aload 1 /* axes */
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            iconst_1
            iadd
            newarray 10
            astore 2 /* axesSizeProduct */
        start local 2 // int[] axesSizeProduct
         3: .line 53
            aload 2 /* axesSizeProduct */
            aload 1 /* axes */
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            iconst_1
            iastore
         4: .line 55
            aload 1 /* axes */
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            iconst_1
            isub
            istore 3 /* i */
        start local 3 // int i
         5: goto 8
         6: .line 56
      StackMap locals: com.google.common.collect.CartesianList com.google.common.collect.ImmutableList int[] int
      StackMap stack:
            aload 2 /* axesSizeProduct */
            iload 3 /* i */
            aload 2 /* axesSizeProduct */
            iload 3 /* i */
            iconst_1
            iadd
            iaload
            aload 1 /* axes */
            iload 3 /* i */
            invokevirtual com.google.common.collect.ImmutableList.get:(I)Ljava/lang/Object;
            checkcast java.util.List
            invokeinterface java.util.List.size:()I
            invokestatic com.google.common.math.IntMath.checkedMultiply:(II)I
            iastore
         7: .line 55
            iinc 3 /* i */ -1
      StackMap locals:
      StackMap stack:
         8: iload 3 /* i */
            ifge 6
        end local 3 // int i
         9: .line 58
            goto 14
      StackMap locals: com.google.common.collect.CartesianList com.google.common.collect.ImmutableList int[]
      StackMap stack: java.lang.ArithmeticException
        10: pop
        11: .line 59
            new java.lang.IllegalArgumentException
            dup
        12: .line 60
            ldc "Cartesian product too large; must have size at most Integer.MAX_VALUE"
        13: .line 59
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        14: .line 62
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 2 /* axesSizeProduct */
            putfield com.google.common.collect.CartesianList.axesSizeProduct:[I
        15: .line 63
            return
        end local 2 // int[] axesSizeProduct
        end local 1 // com.google.common.collect.ImmutableList axes
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   16     0             this  Lcom/google/common/collect/CartesianList<TE;>;
            0   16     1             axes  Lcom/google/common/collect/ImmutableList<Ljava/util/List<TE;>;>;
            3   16     2  axesSizeProduct  [I
            5    9     3                i  I
      Exception table:
        from    to  target  type
           4     9      10  Class java.lang.ArithmeticException
    Signature: (Lcom/google/common/collect/ImmutableList<Ljava/util/List<TE;>;>;)V
    MethodParameters:
      Name  Flags
      axes  

  private int getAxisIndexForProductIndex(int, int);
    descriptor: (II)I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // int index
        start local 2 // int axis
         0: .line 66
            iload 1 /* index */
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axesSizeProduct:[I
            iload 2 /* axis */
            iconst_1
            iadd
            iaload
            idiv
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            iload 2 /* axis */
            invokevirtual com.google.common.collect.ImmutableList.get:(I)Ljava/lang/Object;
            checkcast java.util.List
            invokeinterface java.util.List.size:()I
            irem
            ireturn
        end local 2 // int axis
        end local 1 // int index
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/CartesianList<TE;>;
            0    1     1  index  I
            0    1     2   axis  I
    MethodParameters:
       Name  Flags
      index  
      axis   

  public int indexOf(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=7, args_size=2
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // java.lang.Object o
         0: .line 71
            aload 1 /* o */
            instanceof java.util.List
            ifne 2
         1: .line 72
            iconst_m1
            ireturn
         2: .line 74
      StackMap locals:
      StackMap stack:
            aload 1 /* o */
            checkcast java.util.List
            astore 2 /* list */
        start local 2 // java.util.List list
         3: .line 75
            aload 2 /* list */
            invokeinterface java.util.List.size:()I
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            if_icmpeq 5
         4: .line 76
            iconst_m1
            ireturn
         5: .line 78
      StackMap locals: java.util.List
      StackMap stack:
            aload 2 /* list */
            invokeinterface java.util.List.listIterator:()Ljava/util/ListIterator;
            astore 3 /* itr */
        start local 3 // java.util.ListIterator itr
         6: .line 79
            iconst_0
            istore 4 /* computedIndex */
        start local 4 // int computedIndex
         7: .line 80
            goto 13
         8: .line 81
      StackMap locals: java.util.ListIterator int
      StackMap stack:
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.nextIndex:()I
            istore 5 /* axisIndex */
        start local 5 // int axisIndex
         9: .line 82
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            iload 5 /* axisIndex */
            invokevirtual com.google.common.collect.ImmutableList.get:(I)Ljava/lang/Object;
            checkcast java.util.List
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.next:()Ljava/lang/Object;
            invokeinterface java.util.List.indexOf:(Ljava/lang/Object;)I
            istore 6 /* elemIndex */
        start local 6 // int elemIndex
        10: .line 83
            iload 6 /* elemIndex */
            iconst_m1
            if_icmpne 12
        11: .line 84
            iconst_m1
            ireturn
        12: .line 86
      StackMap locals: int int
      StackMap stack:
            iload 4 /* computedIndex */
            iload 6 /* elemIndex */
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axesSizeProduct:[I
            iload 5 /* axisIndex */
            iconst_1
            iadd
            iaload
            imul
            iadd
            istore 4 /* computedIndex */
        end local 6 // int elemIndex
        end local 5 // int axisIndex
        13: .line 80
      StackMap locals:
      StackMap stack:
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.hasNext:()Z
            ifne 8
        14: .line 88
            iload 4 /* computedIndex */
            ireturn
        end local 4 // int computedIndex
        end local 3 // java.util.ListIterator itr
        end local 2 // java.util.List list
        end local 1 // java.lang.Object o
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   15     0           this  Lcom/google/common/collect/CartesianList<TE;>;
            0   15     1              o  Ljava/lang/Object;
            3   15     2           list  Ljava/util/List<*>;
            6   15     3            itr  Ljava/util/ListIterator<*>;
            7   15     4  computedIndex  I
            9   13     5      axisIndex  I
           10   13     6      elemIndex  I
    MethodParameters:
      Name  Flags
      o     

  public int lastIndexOf(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=7, args_size=2
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // java.lang.Object o
         0: .line 93
            aload 1 /* o */
            instanceof java.util.List
            ifne 2
         1: .line 94
            iconst_m1
            ireturn
         2: .line 96
      StackMap locals:
      StackMap stack:
            aload 1 /* o */
            checkcast java.util.List
            astore 2 /* list */
        start local 2 // java.util.List list
         3: .line 97
            aload 2 /* list */
            invokeinterface java.util.List.size:()I
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            if_icmpeq 5
         4: .line 98
            iconst_m1
            ireturn
         5: .line 100
      StackMap locals: java.util.List
      StackMap stack:
            aload 2 /* list */
            invokeinterface java.util.List.listIterator:()Ljava/util/ListIterator;
            astore 3 /* itr */
        start local 3 // java.util.ListIterator itr
         6: .line 101
            iconst_0
            istore 4 /* computedIndex */
        start local 4 // int computedIndex
         7: .line 102
            goto 13
         8: .line 103
      StackMap locals: java.util.ListIterator int
      StackMap stack:
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.nextIndex:()I
            istore 5 /* axisIndex */
        start local 5 // int axisIndex
         9: .line 104
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            iload 5 /* axisIndex */
            invokevirtual com.google.common.collect.ImmutableList.get:(I)Ljava/lang/Object;
            checkcast java.util.List
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.next:()Ljava/lang/Object;
            invokeinterface java.util.List.lastIndexOf:(Ljava/lang/Object;)I
            istore 6 /* elemIndex */
        start local 6 // int elemIndex
        10: .line 105
            iload 6 /* elemIndex */
            iconst_m1
            if_icmpne 12
        11: .line 106
            iconst_m1
            ireturn
        12: .line 108
      StackMap locals: int int
      StackMap stack:
            iload 4 /* computedIndex */
            iload 6 /* elemIndex */
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axesSizeProduct:[I
            iload 5 /* axisIndex */
            iconst_1
            iadd
            iaload
            imul
            iadd
            istore 4 /* computedIndex */
        end local 6 // int elemIndex
        end local 5 // int axisIndex
        13: .line 102
      StackMap locals:
      StackMap stack:
            aload 3 /* itr */
            invokeinterface java.util.ListIterator.hasNext:()Z
            ifne 8
        14: .line 110
            iload 4 /* computedIndex */
            ireturn
        end local 4 // int computedIndex
        end local 3 // java.util.ListIterator itr
        end local 2 // java.util.List list
        end local 1 // java.lang.Object o
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   15     0           this  Lcom/google/common/collect/CartesianList<TE;>;
            0   15     1              o  Ljava/lang/Object;
            3   15     2           list  Ljava/util/List<*>;
            6   15     3            itr  Ljava/util/ListIterator<*>;
            7   15     4  computedIndex  I
            9   13     5      axisIndex  I
           10   13     6      elemIndex  I
    MethodParameters:
      Name  Flags
      o     

  public com.google.common.collect.ImmutableList<E> get(int);
    descriptor: (I)Lcom/google/common/collect/ImmutableList;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // int index
         0: .line 115
            iload 1 /* index */
            aload 0 /* this */
            invokevirtual com.google.common.collect.CartesianList.size:()I
            invokestatic com.google.common.base.Preconditions.checkElementIndex:(II)I
            pop
         1: .line 116
            new com.google.common.collect.CartesianList$1
            dup
            aload 0 /* this */
            iload 1 /* index */
            invokespecial com.google.common.collect.CartesianList$1.<init>:(Lcom/google/common/collect/CartesianList;I)V
            areturn
        end local 1 // int index
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/google/common/collect/CartesianList<TE;>;
            0    2     1  index  I
    Signature: (I)Lcom/google/common/collect/ImmutableList<TE;>;
    MethodParameters:
       Name  Flags
      index  final

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.collect.CartesianList this
         0: .line 139
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axesSizeProduct:[I
            iconst_0
            iaload
            ireturn
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/CartesianList<TE;>;

  public boolean contains(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=6, args_size=2
        start local 0 // com.google.common.collect.CartesianList this
        start local 1 // java.lang.Object object
         0: .line 144
            aload 1 /* object */
            instanceof java.util.List
            ifne 2
         1: .line 145
            iconst_0
            ireturn
         2: .line 147
      StackMap locals:
      StackMap stack:
            aload 1 /* object */
            checkcast java.util.List
            astore 2 /* list */
        start local 2 // java.util.List list
         3: .line 148
            aload 2 /* list */
            invokeinterface java.util.List.size:()I
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            invokevirtual com.google.common.collect.ImmutableList.size:()I
            if_icmpeq 5
         4: .line 149
            iconst_0
            ireturn
         5: .line 151
      StackMap locals: java.util.List
      StackMap stack:
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         6: .line 152
            aload 2 /* list */
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 5
            goto 11
      StackMap locals: com.google.common.collect.CartesianList java.lang.Object java.util.List int top java.util.Iterator
      StackMap stack:
         7: aload 5
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            astore 4 /* o */
        start local 4 // java.lang.Object o
         8: .line 153
            aload 0 /* this */
            getfield com.google.common.collect.CartesianList.axes:Lcom/google/common/collect/ImmutableList;
            iload 3 /* i */
            invokevirtual com.google.common.collect.ImmutableList.get:(I)Ljava/lang/Object;
            checkcast java.util.List
            aload 4 /* o */
            invokeinterface java.util.List.contains:(Ljava/lang/Object;)Z
            ifne 10
         9: .line 154
            iconst_0
            ireturn
        10: .line 156
      StackMap locals: com.google.common.collect.CartesianList java.lang.Object java.util.List int java.lang.Object java.util.Iterator
      StackMap stack:
            iinc 3 /* i */ 1
        end local 4 // java.lang.Object o
        11: .line 152
      StackMap locals: com.google.common.collect.CartesianList java.lang.Object java.util.List int top java.util.Iterator
      StackMap stack:
            aload 5
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 7
        12: .line 158
            iconst_1
            ireturn
        end local 3 // int i
        end local 2 // java.util.List list
        end local 1 // java.lang.Object object
        end local 0 // com.google.common.collect.CartesianList this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   13     0    this  Lcom/google/common/collect/CartesianList<TE;>;
            0   13     1  object  Ljava/lang/Object;
            3   13     2    list  Ljava/util/List<*>;
            6   13     3       i  I
            8   11     4       o  Ljava/lang/Object;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
        Name  Flags
      object  

  public java.lang.Object get(int);
    descriptor: (I)Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            iload 1
            invokevirtual com.google.common.collect.CartesianList.get:(I)Lcom/google/common/collect/ImmutableList;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <E:Ljava/lang/Object;>Ljava/util/AbstractList<Ljava/util/List<TE;>;>;Ljava/util/RandomAccess;
SourceFile: "CartesianList.java"
NestMembers:
  com.google.common.collect.CartesianList$1
InnerClasses:
  com.google.common.collect.CartesianList$1
  public final Builder = com.google.common.collect.ImmutableList$Builder of com.google.common.collect.ImmutableList
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible()