https://www.graalvm.org/ 
final class com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode extends com.oracle.truffle.js.nodes.control.AbstractRepeatingNode
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode
  super_class: com.oracle.truffle.js.nodes.control.AbstractRepeatingNode
{
  void <init>(com.oracle.truffle.js.nodes.JavaScriptNode, com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
        start local 1 // com.oracle.truffle.js.nodes.JavaScriptNode condition
        start local 2 // com.oracle.truffle.js.nodes.JavaScriptNode body
         0: .line 225
            aload 0 /* this */
            aload 1 /* condition */
            aload 2 /* body */
            invokespecial com.oracle.truffle.js.nodes.control.AbstractRepeatingNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
         1: .line 226
            return
        end local 2 // com.oracle.truffle.js.nodes.JavaScriptNode body
        end local 1 // com.oracle.truffle.js.nodes.JavaScriptNode condition
        end local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lcom/oracle/truffle/js/nodes/control/WhileNode$WhileDoRepeatingNode;
            0    2     1  condition  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            0    2     2       body  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
           Name  Flags
      condition  
      body       

  public boolean executeRepeating(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 230
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.executeCondition:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Z
            ifeq 3
         1: .line 231
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.executeBody:(Lcom/oracle/truffle/api/frame/VirtualFrame;)V
         2: .line 232
            iconst_1
            ireturn
         3: .line 234
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lcom/oracle/truffle/js/nodes/control/WhileNode$WhileDoRepeatingNode;
            0    4     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  

  public java.lang.Object resume(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 239
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.getStateAsIntAndReset:(Lcom/oracle/truffle/api/frame/VirtualFrame;)I
            istore 2 /* index */
        start local 2 // int index
         1: .line 240
            iload 2 /* index */
            ifne 2
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.executeCondition:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Z
            ifeq 8
         2: .line 242
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.executeBody:(Lcom/oracle/truffle/api/frame/VirtualFrame;)V
         3: .line 243
            goto 7
      StackMap locals:
      StackMap stack: com.oracle.truffle.js.nodes.control.YieldException
         4: astore 3 /* e */
        start local 3 // com.oracle.truffle.js.nodes.control.YieldException e
         5: .line 244
            aload 0 /* this */
            aload 1 /* frame */
            iconst_1
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            invokevirtual com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.setState:(Lcom/oracle/truffle/api/frame/VirtualFrame;Ljava/lang/Object;)V
         6: .line 245
            aload 3 /* e */
            athrow
        end local 3 // com.oracle.truffle.js.nodes.control.YieldException e
         7: .line 247
      StackMap locals:
      StackMap stack:
            iconst_1
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
         8: .line 249
      StackMap locals:
      StackMap stack:
            iconst_0
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            areturn
        end local 2 // int index
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    9     0   this  Lcom/oracle/truffle/js/nodes/control/WhileNode$WhileDoRepeatingNode;
            0    9     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
            1    9     2  index  I
            5    7     3      e  Lcom/oracle/truffle/js/nodes/control/YieldException;
      Exception table:
        from    to  target  type
           2     3       4  Class com.oracle.truffle.js.nodes.control.YieldException
    MethodParameters:
       Name  Flags
      frame  

  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=5, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
        start local 1 // java.util.Set materializedTags
         0: .line 254
            new com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.conditionNode:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* materializedTags */
            invokestatic com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.cloneUninitialized:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.bodyNode:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* materializedTags */
            invokestatic com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.cloneUninitialized:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokespecial com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/nodes/control/WhileNode$WhileDoRepeatingNode;
            0    1     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  
}
SourceFile: "WhileNode.java"
NestHost: com.oracle.truffle.js.nodes.control.WhileNode
InnerClasses:
  private final WhileDoRepeatingNode = com.oracle.truffle.js.nodes.control.WhileNode$WhileDoRepeatingNode of com.oracle.truffle.js.nodes.control.WhileNode