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.Streams$3Splitr extends com.google.common.collect.Streams$MapWithIndexSpliterator<java.util.Spliterator$OfLong, R, com.google.common.collect.Streams$3Splitr> implements java.util.function.LongConsumer, java.util.Spliterator<R>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Streams$3Splitr
  super_class: com.google.common.collect.Streams$MapWithIndexSpliterator
{
  long holder;
    descriptor: J
    flags: (0x0000) 

  private final com.google.common.collect.Streams$LongFunctionWithIndex val$function;
    descriptor: Lcom/google/common/collect/Streams$LongFunctionWithIndex;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(java.util.Spliterator$OfLong, long, com.google.common.collect.Streams$LongFunctionWithIndex);
    descriptor: (Ljava/util/Spliterator$OfLong;JLcom/google/common/collect/Streams$LongFunctionWithIndex;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=5, args_size=4
        start local 0 // com.google.common.collect.Streams$3Splitr this
        start local 1 // java.util.Spliterator$OfLong splitr
        start local 2 // long index
         0: .line 538
            aload 0 /* this */
            aload 4
            putfield com.google.common.collect.Streams$3Splitr.val$function:Lcom/google/common/collect/Streams$LongFunctionWithIndex;
         1: .line 539
            aload 0 /* this */
            aload 1 /* splitr */
            lload 2 /* index */
            invokespecial com.google.common.collect.Streams$MapWithIndexSpliterator.<init>:(Ljava/util/Spliterator;J)V
         2: .line 540
            return
        end local 2 // long index
        end local 1 // java.util.Spliterator$OfLong splitr
        end local 0 // com.google.common.collect.Streams$3Splitr this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lcom/google/common/collect/Streams$3Splitr;
            0    3     1  splitr  Ljava/util/Spliterator$OfLong;
            0    3     2   index  J
    MethodParameters:
              Name  Flags
      splitr        
      index         
      val$function  final

  public void accept(long);
    descriptor: (J)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // com.google.common.collect.Streams$3Splitr this
        start local 1 // long t
         0: .line 544
            aload 0 /* this */
            lload 1 /* t */
            putfield com.google.common.collect.Streams$3Splitr.holder:J
         1: .line 545
            return
        end local 1 // long t
        end local 0 // com.google.common.collect.Streams$3Splitr this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/collect/Streams$3Splitr;
            0    2     1     t  J
    MethodParameters:
      Name  Flags
      t     

  public boolean tryAdvance(java.util.function.Consumer<? super R>);
    descriptor: (Ljava/util/function/Consumer;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=11, locals=2, args_size=2
        start local 0 // com.google.common.collect.Streams$3Splitr this
        start local 1 // java.util.function.Consumer action
         0: .line 549
            aload 0 /* this */
            getfield com.google.common.collect.Streams$3Splitr.fromSpliterator:Ljava/util/Spliterator;
            checkcast java.util.Spliterator$OfLong
            aload 0 /* this */
            invokeinterface java.util.Spliterator$OfLong.tryAdvance:(Ljava/util/function/LongConsumer;)Z
            ifeq 3
         1: .line 550
            aload 1 /* action */
            aload 0 /* this */
            getfield com.google.common.collect.Streams$3Splitr.val$function:Lcom/google/common/collect/Streams$LongFunctionWithIndex;
            aload 0 /* this */
            getfield com.google.common.collect.Streams$3Splitr.holder:J
            aload 0 /* this */
            dup
            getfield com.google.common.collect.Streams$3Splitr.index:J
            dup2_x1
            lconst_1
            ladd
            putfield com.google.common.collect.Streams$3Splitr.index:J
            invokeinterface com.google.common.collect.Streams$LongFunctionWithIndex.apply:(JJ)Ljava/lang/Object;
            invokeinterface java.util.function.Consumer.accept:(Ljava/lang/Object;)V
         2: .line 551
            iconst_1
            ireturn
         3: .line 553
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.util.function.Consumer action
        end local 0 // com.google.common.collect.Streams$3Splitr this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/google/common/collect/Streams$3Splitr;
            0    4     1  action  Ljava/util/function/Consumer<-TR;>;
    Signature: (Ljava/util/function/Consumer<-TR;>;)Z
    MethodParameters:
        Name  Flags
      action  

  com.google.common.collect.Streams$3Splitr createSplit(java.util.Spliterator$OfLong, long);
    descriptor: (Ljava/util/Spliterator$OfLong;J)Lcom/google/common/collect/Streams$3Splitr;
    flags: (0x0000) 
    Code:
      stack=6, locals=4, args_size=3
        start local 0 // com.google.common.collect.Streams$3Splitr this
        start local 1 // java.util.Spliterator$OfLong from
        start local 2 // long i
         0: .line 558
            new com.google.common.collect.Streams$3Splitr
            dup
            aload 1 /* from */
            lload 2 /* i */
            aload 0 /* this */
            getfield com.google.common.collect.Streams$3Splitr.val$function:Lcom/google/common/collect/Streams$LongFunctionWithIndex;
            invokespecial com.google.common.collect.Streams$3Splitr.<init>:(Ljava/util/Spliterator$OfLong;JLcom/google/common/collect/Streams$LongFunctionWithIndex;)V
            areturn
        end local 2 // long i
        end local 1 // java.util.Spliterator$OfLong from
        end local 0 // com.google.common.collect.Streams$3Splitr this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Streams$3Splitr;
            0    1     1  from  Ljava/util/Spliterator$OfLong;
            0    1     2     i  J
    MethodParameters:
      Name  Flags
      from  
      i     

  com.google.common.collect.Streams$MapWithIndexSpliterator createSplit(java.util.Spliterator, long);
    descriptor: (Ljava/util/Spliterator;J)Lcom/google/common/collect/Streams$MapWithIndexSpliterator;
    flags: (0x1040) ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=4, locals=4, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast java.util.Spliterator$OfLong
            lload 2
            invokevirtual com.google.common.collect.Streams$3Splitr.createSplit:(Ljava/util/Spliterator$OfLong;J)Lcom/google/common/collect/Streams$3Splitr;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/google/common/collect/Streams$MapWithIndexSpliterator<Ljava/util/Spliterator$OfLong;TR;Lcom/google/common/collect/Streams$3Splitr;>;Ljava/util/function/LongConsumer;Ljava/util/Spliterator<TR;>;
SourceFile: "Streams.java"
EnclosingMethod: com.google.common.collect.Streams.mapWithIndex:(Ljava/util/stream/LongStream;Lcom/google/common/collect/Streams$LongFunctionWithIndex;)Ljava/util/stream/Stream;
NestHost: com.google.common.collect.Streams
InnerClasses:
  Splitr = com.google.common.collect.Streams$3Splitr
  public abstract LongFunctionWithIndex = com.google.common.collect.Streams$LongFunctionWithIndex of com.google.common.collect.Streams
  private abstract MapWithIndexSpliterator = com.google.common.collect.Streams$MapWithIndexSpliterator of com.google.common.collect.Streams
  public abstract OfLong = java.util.Spliterator$OfLong of java.util.Spliterator