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$TransformedEntriesSortedMap<K, V1, V2> extends com.google.common.collect.Maps$TransformedEntriesMap<K, V1, V2> implements java.util.SortedMap<K, V2>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Maps$TransformedEntriesSortedMap
  super_class: com.google.common.collect.Maps$TransformedEntriesMap
{
  protected java.util.SortedMap<K, V1> fromMap();
    descriptor: ()Ljava/util/SortedMap;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
         0: .line 2091
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:Ljava/util/Map;
            checkcast java.util.SortedMap
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/SortedMap<TK;TV1;>;

  void <init>(java.util.SortedMap<K, V1>, com.google.common.collect.Maps$EntryTransformer<? super K, ? super V1, V2>);
    descriptor: (Ljava/util/SortedMap;Lcom/google/common/collect/Maps$EntryTransformer;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
        start local 1 // java.util.SortedMap fromMap
        start local 2 // com.google.common.collect.Maps$EntryTransformer transformer
         0: .line 2096
            aload 0 /* this */
            aload 1 /* fromMap */
            aload 2 /* transformer */
            invokespecial com.google.common.collect.Maps$TransformedEntriesMap.<init>:(Ljava/util/Map;Lcom/google/common/collect/Maps$EntryTransformer;)V
         1: .line 2097
            return
        end local 2 // com.google.common.collect.Maps$EntryTransformer transformer
        end local 1 // java.util.SortedMap fromMap
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    2     0         this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
            0    2     1      fromMap  Ljava/util/SortedMap<TK;TV1;>;
            0    2     2  transformer  Lcom/google/common/collect/Maps$EntryTransformer<-TK;-TV1;TV2;>;
    Signature: (Ljava/util/SortedMap<TK;TV1;>;Lcom/google/common/collect/Maps$EntryTransformer<-TK;-TV1;TV2;>;)V
    MethodParameters:
             Name  Flags
      fromMap      
      transformer  

  public java.util.Comparator<? super K> comparator();
    descriptor: ()Ljava/util/Comparator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
         0: .line 2101
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            invokeinterface java.util.SortedMap.comparator:()Ljava/util/Comparator;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/Comparator<-TK;>;

  public K firstKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
         0: .line 2106
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            invokeinterface java.util.SortedMap.firstKey:()Ljava/lang/Object;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
    Signature: ()TK;

  public java.util.SortedMap<K, V2> headMap(K);
    descriptor: (Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
        start local 1 // java.lang.Object toKey
         0: .line 2111
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            aload 1 /* toKey */
            invokeinterface java.util.SortedMap.headMap:(Ljava/lang/Object;)Ljava/util/SortedMap;
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesSortedMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            invokestatic com.google.common.collect.Maps.transformEntries:(Ljava/util/SortedMap;Lcom/google/common/collect/Maps$EntryTransformer;)Ljava/util/SortedMap;
            areturn
        end local 1 // java.lang.Object toKey
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
            0    1     1  toKey  TK;
    Signature: (TK;)Ljava/util/SortedMap<TK;TV2;>;
    MethodParameters:
       Name  Flags
      toKey  

  public K lastKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
         0: .line 2116
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            invokeinterface java.util.SortedMap.lastKey:()Ljava/lang/Object;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
    Signature: ()TK;

  public java.util.SortedMap<K, V2> subMap(K, K);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
        start local 1 // java.lang.Object fromKey
        start local 2 // java.lang.Object toKey
         0: .line 2121
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            aload 1 /* fromKey */
            aload 2 /* toKey */
            invokeinterface java.util.SortedMap.subMap:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/util/SortedMap;
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesSortedMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            invokestatic com.google.common.collect.Maps.transformEntries:(Ljava/util/SortedMap;Lcom/google/common/collect/Maps$EntryTransformer;)Ljava/util/SortedMap;
            areturn
        end local 2 // java.lang.Object toKey
        end local 1 // java.lang.Object fromKey
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
            0    1     1  fromKey  TK;
            0    1     2    toKey  TK;
    Signature: (TK;TK;)Ljava/util/SortedMap<TK;TV2;>;
    MethodParameters:
         Name  Flags
      fromKey  
      toKey    

  public java.util.SortedMap<K, V2> tailMap(K);
    descriptor: (Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
        start local 1 // java.lang.Object fromKey
         0: .line 2126
            aload 0 /* this */
            invokevirtual com.google.common.collect.Maps$TransformedEntriesSortedMap.fromMap:()Ljava/util/SortedMap;
            aload 1 /* fromKey */
            invokeinterface java.util.SortedMap.tailMap:(Ljava/lang/Object;)Ljava/util/SortedMap;
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesSortedMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            invokestatic com.google.common.collect.Maps.transformEntries:(Ljava/util/SortedMap;Lcom/google/common/collect/Maps$EntryTransformer;)Ljava/util/SortedMap;
            areturn
        end local 1 // java.lang.Object fromKey
        end local 0 // com.google.common.collect.Maps$TransformedEntriesSortedMap this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lcom/google/common/collect/Maps$TransformedEntriesSortedMap<TK;TV1;TV2;>;
            0    1     1  fromKey  TK;
    Signature: (TK;)Ljava/util/SortedMap<TK;TV2;>;
    MethodParameters:
         Name  Flags
      fromKey  
}
Signature: <K:Ljava/lang/Object;V1:Ljava/lang/Object;V2:Ljava/lang/Object;>Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;Ljava/util/SortedMap<TK;TV2;>;
SourceFile: "Maps.java"
NestHost: com.google.common.collect.Maps
InnerClasses:
  public abstract EntryTransformer = com.google.common.collect.Maps$EntryTransformer of com.google.common.collect.Maps
  TransformedEntriesMap = com.google.common.collect.Maps$TransformedEntriesMap of com.google.common.collect.Maps
  TransformedEntriesSortedMap = com.google.common.collect.Maps$TransformedEntriesSortedMap of com.google.common.collect.Maps