https://www.graalvm.org/ 
class org.graalvm.compiler.graph.NodeMap$3 implements java.lang.Iterable<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.compiler.graph.NodeMap$3
  super_class: java.lang.Object
{
  final org.graalvm.compiler.graph.NodeMap this$0;
    descriptor: Lorg/graalvm/compiler/graph/NodeMap;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.graalvm.compiler.graph.NodeMap);
    descriptor: (Lorg/graalvm/compiler/graph/NodeMap;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.graph.NodeMap$3 this
         0: .line 218
            aload 0 /* this */
            aload 1
            putfield org.graalvm.compiler.graph.NodeMap$3.this$0:Lorg/graalvm/compiler/graph/NodeMap;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.graalvm.compiler.graph.NodeMap$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/compiler/graph/NodeMap$3;
    MethodParameters:
        Name  Flags
      this$0  final

  public java.util.Iterator<T> iterator();
    descriptor: ()Ljava/util/Iterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.graalvm.compiler.graph.NodeMap$3 this
         0: .line 222
            new org.graalvm.compiler.graph.NodeMap$3$1
            dup
            aload 0 /* this */
            invokespecial org.graalvm.compiler.graph.NodeMap$3$1.<init>:(Lorg/graalvm/compiler/graph/NodeMap$3;)V
            areturn
        end local 0 // org.graalvm.compiler.graph.NodeMap$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/compiler/graph/NodeMap$3;
    Signature: ()Ljava/util/Iterator<TT;>;

  static org.graalvm.compiler.graph.NodeMap access$0(org.graalvm.compiler.graph.NodeMap$3);
    descriptor: (Lorg/graalvm/compiler/graph/NodeMap$3;)Lorg/graalvm/compiler/graph/NodeMap;
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 218
            aload 0
            getfield org.graalvm.compiler.graph.NodeMap$3.this$0:Lorg/graalvm/compiler/graph/NodeMap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/lang/Iterable<TT;>;
SourceFile: "NodeMap.java"
EnclosingMethod: org.graalvm.compiler.graph.NodeMap.getValues:()Ljava/lang/Iterable;
NestHost: org.graalvm.compiler.graph.NodeMap
InnerClasses:
  org.graalvm.compiler.graph.NodeMap$3
  org.graalvm.compiler.graph.NodeMap$3$1