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.ImmutableSortedMap$1 implements java.util.Comparator<java.util.Map$Entry<K, V>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.ImmutableSortedMap$1
  super_class: java.lang.Object
{
  private final java.util.Comparator val$comparator;
    descriptor: Ljava/util/Comparator;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(java.util.Comparator);
    descriptor: (Ljava/util/Comparator;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.ImmutableSortedMap$1 this
         0: .line 375
            aload 0 /* this */
            aload 1
            putfield com.google.common.collect.ImmutableSortedMap$1.val$comparator:Ljava/util/Comparator;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.collect.ImmutableSortedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ImmutableSortedMap$1;
    MethodParameters:
                Name  Flags
      val$comparator  final

  public int compare(java.util.Map$Entry<K, V>, java.util.Map$Entry<K, V>);
    descriptor: (Ljava/util/Map$Entry;Ljava/util/Map$Entry;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.common.collect.ImmutableSortedMap$1 this
        start local 1 // java.util.Map$Entry e1
        start local 2 // java.util.Map$Entry e2
         0: .line 378
            aload 0 /* this */
            getfield com.google.common.collect.ImmutableSortedMap$1.val$comparator:Ljava/util/Comparator;
            aload 1 /* e1 */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            aload 2 /* e2 */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            invokeinterface java.util.Comparator.compare:(Ljava/lang/Object;Ljava/lang/Object;)I
            ireturn
        end local 2 // java.util.Map$Entry e2
        end local 1 // java.util.Map$Entry e1
        end local 0 // com.google.common.collect.ImmutableSortedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ImmutableSortedMap$1;
            0    1     1    e1  Ljava/util/Map$Entry<TK;TV;>;
            0    1     2    e2  Ljava/util/Map$Entry<TK;TV;>;
    Signature: (Ljava/util/Map$Entry<TK;TV;>;Ljava/util/Map$Entry<TK;TV;>;)I
    MethodParameters:
      Name  Flags
      e1    
      e2    

  public int compare(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast java.util.Map$Entry
            aload 2
            checkcast java.util.Map$Entry
            invokevirtual com.google.common.collect.ImmutableSortedMap$1.compare:(Ljava/util/Map$Entry;Ljava/util/Map$Entry;)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/Comparator<Ljava/util/Map$Entry<TK;TV;>;>;
SourceFile: "ImmutableSortedMap.java"
EnclosingMethod: com.google.common.collect.ImmutableSortedMap.fromEntries:(Ljava/util/Comparator;Z[Ljava/util/Map$Entry;I)Lcom/google/common/collect/ImmutableSortedMap;
NestHost: com.google.common.collect.ImmutableSortedMap
InnerClasses:
  com.google.common.collect.ImmutableSortedMap$1
  public abstract Entry = java.util.Map$Entry of java.util.Map