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.ExplicitOrdering<T> extends com.google.common.collect.Ordering<T> implements java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.collect.ExplicitOrdering
  super_class: com.google.common.collect.Ordering
{
  final com.google.common.collect.ImmutableMap<T, java.lang.Integer> rankMap;
    descriptor: Lcom/google/common/collect/ImmutableMap;
    flags: (0x0010) ACC_FINAL
    Signature: Lcom/google/common/collect/ImmutableMap<TT;Ljava/lang/Integer;>;

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

  void <init>(java.util.List<T>);
    descriptor: (Ljava/util/List;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.ExplicitOrdering this
        start local 1 // java.util.List valuesInOrder
         0: .line 30
            aload 0 /* this */
            aload 1 /* valuesInOrder */
            invokestatic com.google.common.collect.Maps.indexMap:(Ljava/util/Collection;)Lcom/google/common/collect/ImmutableMap;
            invokespecial com.google.common.collect.ExplicitOrdering.<init>:(Lcom/google/common/collect/ImmutableMap;)V
         1: .line 31
            return
        end local 1 // java.util.List valuesInOrder
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    2     0           this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
            0    2     1  valuesInOrder  Ljava/util/List<TT;>;
    Signature: (Ljava/util/List<TT;>;)V
    MethodParameters:
               Name  Flags
      valuesInOrder  

  void <init>(com.google.common.collect.ImmutableMap<T, java.lang.Integer>);
    descriptor: (Lcom/google/common/collect/ImmutableMap;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.ExplicitOrdering this
        start local 1 // com.google.common.collect.ImmutableMap rankMap
         0: .line 33
            aload 0 /* this */
            invokespecial com.google.common.collect.Ordering.<init>:()V
         1: .line 34
            aload 0 /* this */
            aload 1 /* rankMap */
            putfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
         2: .line 35
            return
        end local 1 // com.google.common.collect.ImmutableMap rankMap
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
            0    3     1  rankMap  Lcom/google/common/collect/ImmutableMap<TT;Ljava/lang/Integer;>;
    Signature: (Lcom/google/common/collect/ImmutableMap<TT;Ljava/lang/Integer;>;)V
    MethodParameters:
         Name  Flags
      rankMap  

  public int compare(T, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.common.collect.ExplicitOrdering this
        start local 1 // java.lang.Object left
        start local 2 // java.lang.Object right
         0: .line 39
            aload 0 /* this */
            aload 1 /* left */
            invokevirtual com.google.common.collect.ExplicitOrdering.rank:(Ljava/lang/Object;)I
            aload 0 /* this */
            aload 2 /* right */
            invokevirtual com.google.common.collect.ExplicitOrdering.rank:(Ljava/lang/Object;)I
            isub
            ireturn
        end local 2 // java.lang.Object right
        end local 1 // java.lang.Object left
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
            0    1     1   left  TT;
            0    1     2  right  TT;
    Signature: (TT;TT;)I
    MethodParameters:
       Name  Flags
      left   
      right  

  private int rank();
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // com.google.common.collect.ExplicitOrdering this
        start local 1 // java.lang.Object value
         0: .line 43
            aload 0 /* this */
            getfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
            aload 1 /* value */
            invokevirtual com.google.common.collect.ImmutableMap.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.Integer
            astore 2 /* rank */
        start local 2 // java.lang.Integer rank
         1: .line 44
            aload 2 /* rank */
            ifnonnull 3
         2: .line 45
            new com.google.common.collect.Ordering$IncomparableValueException
            dup
            aload 1 /* value */
            invokespecial com.google.common.collect.Ordering$IncomparableValueException.<init>:(Ljava/lang/Object;)V
            athrow
         3: .line 47
      StackMap locals: java.lang.Integer
      StackMap stack:
            aload 2 /* rank */
            invokevirtual java.lang.Integer.intValue:()I
            ireturn
        end local 2 // java.lang.Integer rank
        end local 1 // java.lang.Object value
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
            0    4     1  value  TT;
            1    4     2   rank  Ljava/lang/Integer;
    Signature: (TT;)I
    MethodParameters:
       Name  Flags
      value  

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // com.google.common.collect.ExplicitOrdering this
        start local 1 // java.lang.Object object
         0: .line 52
            aload 1 /* object */
            instanceof com.google.common.collect.ExplicitOrdering
            ifeq 3
         1: .line 53
            aload 1 /* object */
            checkcast com.google.common.collect.ExplicitOrdering
            astore 2 /* that */
        start local 2 // com.google.common.collect.ExplicitOrdering that
         2: .line 54
            aload 0 /* this */
            getfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
            aload 2 /* that */
            getfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
            invokevirtual com.google.common.collect.ImmutableMap.equals:(Ljava/lang/Object;)Z
            ireturn
        end local 2 // com.google.common.collect.ExplicitOrdering that
         3: .line 56
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.lang.Object object
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
            0    4     1  object  Ljava/lang/Object;
            2    3     2    that  Lcom/google/common/collect/ExplicitOrdering<*>;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
        Name  Flags
      object  

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.ExplicitOrdering this
         0: .line 61
            aload 0 /* this */
            getfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
            invokevirtual com.google.common.collect.ImmutableMap.hashCode:()I
            ireturn
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ExplicitOrdering<TT;>;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.common.collect.ExplicitOrdering this
         0: .line 66
            new java.lang.StringBuilder
            dup
            ldc "Ordering.explicit("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.google.common.collect.ExplicitOrdering.rankMap:Lcom/google/common/collect/ImmutableMap;
            invokevirtual com.google.common.collect.ImmutableMap.keySet:()Lcom/google/common/collect/ImmutableSet;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc ")"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.collect.ExplicitOrdering this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ExplicitOrdering<TT;>;
}
Signature: <T:Ljava/lang/Object;>Lcom/google/common/collect/Ordering<TT;>;Ljava/io/Serializable;
SourceFile: "ExplicitOrdering.java"
InnerClasses:
  IncomparableValueException = com.google.common.collect.Ordering$IncomparableValueException of com.google.common.collect.Ordering
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible(serializable = true)