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.Iterables$6$1 implements java.util.Iterator<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Iterables$6$1
  super_class: java.lang.Object
{
  boolean atStart;
    descriptor: Z
    flags: (0x0000) 

  final com.google.common.collect.Iterables$6 this$1;
    descriptor: Lcom/google/common/collect/Iterables$6;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final java.util.Iterator val$iterator;
    descriptor: Ljava/util/Iterator;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.collect.Iterables$6, java.util.Iterator);
    descriptor: (Lcom/google/common/collect/Iterables$6;Ljava/util/Iterator;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.collect.Iterables$6$1 this
         0: .line 872
            aload 0 /* this */
            aload 1
            putfield com.google.common.collect.Iterables$6$1.this$1:Lcom/google/common/collect/Iterables$6;
            aload 0 /* this */
            aload 2
            putfield com.google.common.collect.Iterables$6$1.val$iterator:Ljava/util/Iterator;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 873
            aload 0 /* this */
            iconst_1
            putfield com.google.common.collect.Iterables$6$1.atStart:Z
         2: .line 872
            return
        end local 0 // com.google.common.collect.Iterables$6$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/google/common/collect/Iterables$6$1;
    MethodParameters:
              Name  Flags
      this$0        final
      val$iterator  final

  public boolean hasNext();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Iterables$6$1 this
         0: .line 877
            aload 0 /* this */
            getfield com.google.common.collect.Iterables$6$1.val$iterator:Ljava/util/Iterator;
            invokeinterface java.util.Iterator.hasNext:()Z
            ireturn
        end local 0 // com.google.common.collect.Iterables$6$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Iterables$6$1;

  public T next();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.google.common.collect.Iterables$6$1 this
         0: .line 882
            aload 0 /* this */
            getfield com.google.common.collect.Iterables$6$1.val$iterator:Ljava/util/Iterator;
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            astore 1 /* result */
        start local 1 // java.lang.Object result
         1: .line 883
            aload 0 /* this */
            iconst_0
            putfield com.google.common.collect.Iterables$6$1.atStart:Z
         2: .line 884
            aload 1 /* result */
            areturn
        end local 1 // java.lang.Object result
        end local 0 // com.google.common.collect.Iterables$6$1 this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lcom/google/common/collect/Iterables$6$1;
            1    3     1  result  TT;
    Signature: ()TT;

  public void remove();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Iterables$6$1 this
         0: .line 889
            aload 0 /* this */
            getfield com.google.common.collect.Iterables$6$1.atStart:Z
            ifeq 1
            iconst_0
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_1
      StackMap locals:
      StackMap stack: int
         2: invokestatic com.google.common.collect.CollectPreconditions.checkRemove:(Z)V
         3: .line 890
            aload 0 /* this */
            getfield com.google.common.collect.Iterables$6$1.val$iterator:Ljava/util/Iterator;
            invokeinterface java.util.Iterator.remove:()V
         4: .line 891
            return
        end local 0 // com.google.common.collect.Iterables$6$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lcom/google/common/collect/Iterables$6$1;
}
Signature: Ljava/lang/Object;Ljava/util/Iterator<TT;>;
SourceFile: "Iterables.java"
EnclosingMethod: com.google.common.collect.Iterables$6.iterator:()Ljava/util/Iterator;
NestHost: com.google.common.collect.Iterables
InnerClasses:
  com.google.common.collect.Iterables$6
  com.google.common.collect.Iterables$6$1