https://www.graalvm.org/ 
public class com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode extends com.oracle.truffle.js.nodes.JavaScriptNode
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode
  super_class: com.oracle.truffle.js.nodes.JavaScriptNode
{
  private com.oracle.truffle.js.nodes.function.JSFunctionCallNode methodCallNode;
    descriptor: Lcom/oracle/truffle/js/nodes/function/JSFunctionCallNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  private com.oracle.truffle.js.nodes.access.IsJSObjectNode isObjectNode;
    descriptor: Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  private com.oracle.truffle.js.nodes.JavaScriptNode iteratorNode;
    descriptor: Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  private final com.oracle.truffle.api.profiles.BranchProfile errorBranch;
    descriptor: Lcom/oracle/truffle/api/profiles/BranchProfile;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected void <init>(com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
        start local 1 // com.oracle.truffle.js.nodes.JavaScriptNode iteratorNode
         0: .line 64
            aload 0 /* this */
            invokespecial com.oracle.truffle.js.nodes.JavaScriptNode.<init>:()V
         1: .line 62
            aload 0 /* this */
            invokestatic com.oracle.truffle.api.profiles.BranchProfile.create:()Lcom/oracle/truffle/api/profiles/BranchProfile;
            putfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.errorBranch:Lcom/oracle/truffle/api/profiles/BranchProfile;
         2: .line 65
            aload 0 /* this */
            aload 1 /* iteratorNode */
            putfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.iteratorNode:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
         3: .line 66
            aload 0 /* this */
            invokestatic com.oracle.truffle.js.nodes.function.JSFunctionCallNode.createCall:()Lcom/oracle/truffle/js/nodes/function/JSFunctionCallNode;
            putfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.methodCallNode:Lcom/oracle/truffle/js/nodes/function/JSFunctionCallNode;
         4: .line 67
            aload 0 /* this */
            invokestatic com.oracle.truffle.js.nodes.access.IsJSObjectNode.create:()Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;
            putfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.isObjectNode:Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;
         5: .line 68
            return
        end local 1 // com.oracle.truffle.js.nodes.JavaScriptNode iteratorNode
        end local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    6     0          this  Lcom/oracle/truffle/js/nodes/access/IteratorNextUnaryNode;
            0    6     1  iteratorNode  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
              Name  Flags
      iteratorNode  

  public static com.oracle.truffle.js.nodes.JavaScriptNode create(com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.JavaScriptNode iteratorNode
         0: .line 71
            new com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode
            dup
            aload 0 /* iteratorNode */
            invokespecial com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 0 // com.oracle.truffle.js.nodes.JavaScriptNode iteratorNode
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    1     0  iteratorNode  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
              Name  Flags
      iteratorNode  

  public java.lang.Object execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 76
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.iteratorNode:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.execute:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
            checkcast com.oracle.truffle.js.runtime.objects.IteratorRecord
            astore 2 /* iterator */
        start local 2 // com.oracle.truffle.js.runtime.objects.IteratorRecord iterator
         1: .line 77
            aload 0 /* this */
            aload 2 /* iterator */
            invokevirtual com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.execute:(Lcom/oracle/truffle/js/runtime/objects/IteratorRecord;)Ljava/lang/Object;
            areturn
        end local 2 // com.oracle.truffle.js.runtime.objects.IteratorRecord iterator
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lcom/oracle/truffle/js/nodes/access/IteratorNextUnaryNode;
            0    2     1     frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
            1    2     2  iterator  Lcom/oracle/truffle/js/runtime/objects/IteratorRecord;
    MethodParameters:
       Name  Flags
      frame  

  public java.lang.Object execute(com.oracle.truffle.js.runtime.objects.IteratorRecord);
    descriptor: (Lcom/oracle/truffle/js/runtime/objects/IteratorRecord;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
        start local 1 // com.oracle.truffle.js.runtime.objects.IteratorRecord iteratorRecord
         0: .line 81
            aload 1 /* iteratorRecord */
            invokevirtual com.oracle.truffle.js.runtime.objects.IteratorRecord.getIterator:()Lcom/oracle/truffle/api/object/DynamicObject;
            astore 2 /* iterator */
        start local 2 // com.oracle.truffle.api.object.DynamicObject iterator
         1: .line 82
            aload 1 /* iteratorRecord */
            invokevirtual com.oracle.truffle.js.runtime.objects.IteratorRecord.getNextMethod:()Ljava/lang/Object;
            astore 3 /* next */
        start local 3 // java.lang.Object next
         2: .line 83
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.methodCallNode:Lcom/oracle/truffle/js/nodes/function/JSFunctionCallNode;
            aload 2 /* iterator */
            aload 3 /* next */
            invokestatic com.oracle.truffle.js.runtime.JSArguments.createZeroArg:(Ljava/lang/Object;Ljava/lang/Object;)[Ljava/lang/Object;
            invokevirtual com.oracle.truffle.js.nodes.function.JSFunctionCallNode.executeCall:([Ljava/lang/Object;)Ljava/lang/Object;
            astore 4 /* nextResult */
        start local 4 // java.lang.Object nextResult
         3: .line 84
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.isObjectNode:Lcom/oracle/truffle/js/nodes/access/IsJSObjectNode;
            aload 4 /* nextResult */
            invokevirtual com.oracle.truffle.js.nodes.access.IsJSObjectNode.executeBoolean:(Ljava/lang/Object;)Z
            ifne 6
         4: .line 85
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.errorBranch:Lcom/oracle/truffle/api/profiles/BranchProfile;
            invokevirtual com.oracle.truffle.api.profiles.BranchProfile.enter:()V
         5: .line 86
            aload 4 /* nextResult */
            aload 0 /* this */
            invokestatic com.oracle.truffle.js.runtime.Errors.createTypeErrorIteratorResultNotObject:(Ljava/lang/Object;Lcom/oracle/truffle/api/nodes/Node;)Lcom/oracle/truffle/js/runtime/JSException;
            athrow
         6: .line 88
      StackMap locals: com.oracle.truffle.api.object.DynamicObject java.lang.Object java.lang.Object
      StackMap stack:
            aload 4 /* nextResult */
            areturn
        end local 4 // java.lang.Object nextResult
        end local 3 // java.lang.Object next
        end local 2 // com.oracle.truffle.api.object.DynamicObject iterator
        end local 1 // com.oracle.truffle.js.runtime.objects.IteratorRecord iteratorRecord
        end local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    7     0            this  Lcom/oracle/truffle/js/nodes/access/IteratorNextUnaryNode;
            0    7     1  iteratorRecord  Lcom/oracle/truffle/js/runtime/objects/IteratorRecord;
            1    7     2        iterator  Lcom/oracle/truffle/api/object/DynamicObject;
            2    7     3            next  Ljava/lang/Object;
            3    7     4      nextResult  Ljava/lang/Object;
    MethodParameters:
                Name  Flags
      iteratorRecord  

  protected com.oracle.truffle.js.nodes.JavaScriptNode copyUninitialized(java.util.Set<java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>>);
    descriptor: (Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
        start local 1 // java.util.Set materializedTags
         0: .line 93
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.iteratorNode:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* materializedTags */
            invokestatic com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.cloneUninitialized:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokestatic com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode.create:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.access.IteratorNextUnaryNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/nodes/access/IteratorNextUnaryNode;
            0    1     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  
}
SourceFile: "IteratorNextUnaryNode.java"
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node