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. 
class com.google.common.collect.Lists$TwoPlusArrayList<E> extends java.util.AbstractList<E> implements java.io.Serializable, java.util.RandomAccess
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Lists$TwoPlusArrayList
  super_class: java.util.AbstractList
{
  final E first;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL
    Signature: TE;
    RuntimeVisibleTypeAnnotations: 
      FIELD
        org.checkerframework.checker.nullness.qual.Nullable()

  final E second;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL
    Signature: TE;
    RuntimeVisibleTypeAnnotations: 
      FIELD
        org.checkerframework.checker.nullness.qual.Nullable()

  final E[] rest;
    descriptor: [Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL
    Signature: [TE;

  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  void <init>(E, E, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;[Ljava/lang/Object;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
        start local 1 // java.lang.Object first
        start local 2 // java.lang.Object second
        start local 3 // java.lang.Object[] rest
         0: .line 347
            aload 0 /* this */
            invokespecial java.util.AbstractList.<init>:()V
         1: .line 348
            aload 0 /* this */
            aload 1 /* first */
            putfield com.google.common.collect.Lists$TwoPlusArrayList.first:Ljava/lang/Object;
         2: .line 349
            aload 0 /* this */
            aload 2 /* second */
            putfield com.google.common.collect.Lists$TwoPlusArrayList.second:Ljava/lang/Object;
         3: .line 350
            aload 0 /* this */
            aload 3 /* rest */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.Object[]
            putfield com.google.common.collect.Lists$TwoPlusArrayList.rest:[Ljava/lang/Object;
         4: .line 351
            return
        end local 3 // java.lang.Object[] rest
        end local 2 // java.lang.Object second
        end local 1 // java.lang.Object first
        end local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0    this  Lcom/google/common/collect/Lists$TwoPlusArrayList<TE;>;
            0    5     1   first  TE;
            0    5     2  second  TE;
            0    5     3    rest  [Ljava/lang/Object;
    Signature: (TE;TE;[TE;)V
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
        Name  Flags
      first   
      second  
      rest    

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
         0: .line 355
            aload 0 /* this */
            getfield com.google.common.collect.Lists$TwoPlusArrayList.rest:[Ljava/lang/Object;
            arraylength
            iconst_2
            invokestatic com.google.common.math.IntMath.saturatedAdd:(II)I
            ireturn
        end local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Lists$TwoPlusArrayList<TE;>;

  public E get();
    descriptor: (I)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
        start local 1 // int index
         0: .line 360
            iload 1 /* index */
            tableswitch { // 0 - 1
                    0: 1
                    1: 2
              default: 3
          }
         1: .line 362
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.google.common.collect.Lists$TwoPlusArrayList.first:Ljava/lang/Object;
            areturn
         2: .line 364
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.google.common.collect.Lists$TwoPlusArrayList.second:Ljava/lang/Object;
            areturn
         3: .line 367
      StackMap locals:
      StackMap stack:
            iload 1 /* index */
            aload 0 /* this */
            invokevirtual com.google.common.collect.Lists$TwoPlusArrayList.size:()I
            invokestatic com.google.common.base.Preconditions.checkElementIndex:(II)I
            pop
         4: .line 368
            aload 0 /* this */
            getfield com.google.common.collect.Lists$TwoPlusArrayList.rest:[Ljava/lang/Object;
            iload 1 /* index */
            iconst_2
            isub
            aaload
            areturn
        end local 1 // int index
        end local 0 // com.google.common.collect.Lists$TwoPlusArrayList this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lcom/google/common/collect/Lists$TwoPlusArrayList<TE;>;
            0    5     1  index  I
    Signature: (I)TE;
    MethodParameters:
       Name  Flags
      index  
}
Signature: <E:Ljava/lang/Object;>Ljava/util/AbstractList<TE;>;Ljava/io/Serializable;Ljava/util/RandomAccess;
SourceFile: "Lists.java"
NestHost: com.google.common.collect.Lists
InnerClasses:
  private TwoPlusArrayList = com.google.common.collect.Lists$TwoPlusArrayList of com.google.common.collect.Lists