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.CollectSpliterators$FlatMapSpliteratorOfInt<InElementT> extends com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfPrimitive<InElementT, java.lang.Integer, java.util.function.IntConsumer, java.util.Spliterator$OfInt> implements java.util.Spliterator$OfInt
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt
  super_class: com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfPrimitive
{
  void <init>(java.util.Spliterator$OfInt, java.util.Spliterator<InElementT>, java.util.function.Function<? super InElementT, java.util.Spliterator$OfInt>, int, );
    descriptor: (Ljava/util/Spliterator$OfInt;Ljava/util/Spliterator;Ljava/util/function/Function;IJ)V
    flags: (0x0000) 
    Code:
      stack=8, locals=7, args_size=6
        start local 0 // com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt this
        start local 1 // java.util.Spliterator$OfInt prefix
        start local 2 // java.util.Spliterator from
        start local 3 // java.util.function.Function function
        start local 4 // int characteristics
        start local 5 // long estimatedSize
         0: .line 501
            aload 0 /* this */
            aload 1 /* prefix */
            aload 2 /* from */
            aload 3 /* function */
            invokedynamic newFlatMapSpliterator()Lcom/google/common/collect/CollectSpliterators$FlatMapSpliterator$Factory;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/util/Spliterator;Ljava/util/Spliterator;Ljava/util/function/Function;IJ)Ljava/util/Spliterator;
                  com/google/common/collect/CollectSpliterators$FlatMapSpliteratorOfInt.<init>(Ljava/util/Spliterator$OfInt;Ljava/util/Spliterator;Ljava/util/function/Function;IJ)V (8)
                  (Ljava/util/Spliterator$OfInt;Ljava/util/Spliterator;Ljava/util/function/Function;IJ)Ljava/util/Spliterator$OfInt;
            iload 4 /* characteristics */
            lload 5 /* estimatedSize */
            invokespecial com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfPrimitive.<init>:(Ljava/util/Spliterator$OfPrimitive;Ljava/util/Spliterator;Ljava/util/function/Function;Lcom/google/common/collect/CollectSpliterators$FlatMapSpliterator$Factory;IJ)V
         1: .line 502
            return
        end local 5 // long estimatedSize
        end local 4 // int characteristics
        end local 3 // java.util.function.Function function
        end local 2 // java.util.Spliterator from
        end local 1 // java.util.Spliterator$OfInt prefix
        end local 0 // com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lcom/google/common/collect/CollectSpliterators$FlatMapSpliteratorOfInt<TInElementT;>;
            0    2     1           prefix  Ljava/util/Spliterator$OfInt;
            0    2     2             from  Ljava/util/Spliterator<TInElementT;>;
            0    2     3         function  Ljava/util/function/Function<-TInElementT;Ljava/util/Spliterator$OfInt;>;
            0    2     4  characteristics  I
            0    2     5    estimatedSize  J
    Signature: (Ljava/util/Spliterator$OfInt;Ljava/util/Spliterator<TInElementT;>;Ljava/util/function/Function<-TInElementT;Ljava/util/Spliterator$OfInt;>;IJ)V
    MethodParameters:
                 Name  Flags
      prefix           
      from             
      function         
      characteristics  
      estimatedSize    

  public boolean tryAdvance(java.util.function.IntConsumer);
    descriptor: (Ljava/util/function/IntConsumer;)Z
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokevirtual com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt.tryAdvance:(Ljava/lang/Object;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void forEachRemaining(java.util.function.IntConsumer);
    descriptor: (Ljava/util/function/IntConsumer;)V
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokevirtual com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt.forEachRemaining:(Ljava/lang/Object;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Spliterator$OfInt trySplit();
    descriptor: ()Ljava/util/Spliterator$OfInt;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt.trySplit:()Ljava/util/Spliterator;
            checkcast java.util.Spliterator$OfInt
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <InElementT:Ljava/lang/Object;>Lcom/google/common/collect/CollectSpliterators$FlatMapSpliteratorOfPrimitive<TInElementT;Ljava/lang/Integer;Ljava/util/function/IntConsumer;Ljava/util/Spliterator$OfInt;>;Ljava/util/Spliterator$OfInt;
SourceFile: "CollectSpliterators.java"
NestHost: com.google.common.collect.CollectSpliterators
InnerClasses:
  abstract FlatMapSpliterator = com.google.common.collect.CollectSpliterators$FlatMapSpliterator of com.google.common.collect.CollectSpliterators
  abstract Factory = com.google.common.collect.CollectSpliterators$FlatMapSpliterator$Factory of com.google.common.collect.CollectSpliterators$FlatMapSpliterator
  final FlatMapSpliteratorOfInt = com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfInt of com.google.common.collect.CollectSpliterators
  abstract FlatMapSpliteratorOfPrimitive = com.google.common.collect.CollectSpliterators$FlatMapSpliteratorOfPrimitive of com.google.common.collect.CollectSpliterators
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles
  public abstract OfInt = java.util.Spliterator$OfInt of java.util.Spliterator
  public abstract OfPrimitive = java.util.Spliterator$OfPrimitive of java.util.Spliterator