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.Maps$FilteredEntryMap$EntrySet$1 extends com.google.common.collect.TransformedIterator<java.util.Map$Entry<K, V>, java.util.Map$Entry<K, V>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1
  super_class: com.google.common.collect.TransformedIterator
{
  final com.google.common.collect.Maps$FilteredEntryMap$EntrySet this$2;
    descriptor: Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.collect.Maps$FilteredEntryMap$EntrySet, java.util.Iterator);
    descriptor: (Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet;Ljava/util/Iterator;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1 this
        start local 2 // java.util.Iterator $anonymous0
         0: .line 2873
            aload 0 /* this */
            aload 1
            putfield com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1.this$2:Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet;
            aload 0 /* this */
            aload 2 /* $anonymous0 */
            invokespecial com.google.common.collect.TransformedIterator.<init>:(Ljava/util/Iterator;)V
            return
        end local 2 // java.util.Iterator $anonymous0
        end local 0 // com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet$1;
            0    1     2  $anonymous0  Ljava/util/Iterator<+Ljava/util/Map$Entry<TK;TV;>;>;
    MethodParameters:
             Name  Flags
      this$0       final
      $anonymous0  

  java.util.Map$Entry<K, V> transform(java.util.Map$Entry<K, V>);
    descriptor: (Ljava/util/Map$Entry;)Ljava/util/Map$Entry;
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1 this
        start local 1 // java.util.Map$Entry entry
         0: .line 2876
            new com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1$1
            dup
            aload 0 /* this */
            aload 1 /* entry */
            invokespecial com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1$1.<init>:(Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet$1;Ljava/util/Map$Entry;)V
            areturn
        end local 1 // java.util.Map$Entry entry
        end local 0 // com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1 this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet$1;
            0    1     1  entry  Ljava/util/Map$Entry<TK;TV;>;
    Signature: (Ljava/util/Map$Entry<TK;TV;>;)Ljava/util/Map$Entry<TK;TV;>;
    MethodParameters:
       Name  Flags
      entry  final

  java.lang.Object transform(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1040) ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.util.Map$Entry
            invokevirtual com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1.transform:(Ljava/util/Map$Entry;)Ljava/util/Map$Entry;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  static com.google.common.collect.Maps$FilteredEntryMap$EntrySet access$1(com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1);
    descriptor: (Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet$1;)Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet;
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 2873
            aload 0
            getfield com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1.this$2:Lcom/google/common/collect/Maps$FilteredEntryMap$EntrySet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/google/common/collect/TransformedIterator<Ljava/util/Map$Entry<TK;TV;>;Ljava/util/Map$Entry<TK;TV;>;>;
SourceFile: "Maps.java"
EnclosingMethod: com.google.common.collect.Maps$FilteredEntryMap$EntrySet.iterator:()Ljava/util/Iterator;
NestHost: com.google.common.collect.Maps
InnerClasses:
  FilteredEntryMap = com.google.common.collect.Maps$FilteredEntryMap of com.google.common.collect.Maps
  private EntrySet = com.google.common.collect.Maps$FilteredEntryMap$EntrySet of com.google.common.collect.Maps$FilteredEntryMap
  com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1
  com.google.common.collect.Maps$FilteredEntryMap$EntrySet$1$1
  public abstract Entry = java.util.Map$Entry of java.util.Map