https://www.graalvm.org/ 
abstract class com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode extends com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode
  super_class: com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode
{
  void <init>(com.oracle.truffle.api.frame.FrameSlot);
    descriptor: (Lcom/oracle/truffle/api/frame/FrameSlot;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.FrameSlot slot
         0: .line 196
            aload 0 /* this */
            aload 1 /* slot */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.<init>:(Lcom/oracle/truffle/api/frame/FrameSlot;)V
         1: .line 197
            return
        end local 1 // com.oracle.truffle.api.frame.FrameSlot slot
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    2     1  slot  Lcom/oracle/truffle/api/frame/FrameSlot;
    MethodParameters:
      Name  Flags
      slot  

  protected final boolean doBoolean(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Z
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 201
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getBoolean:(Lcom/oracle/truffle/api/frame/Frame;)Z
            ireturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"frame.isBoolean(frameSlot)"})
    MethodParameters:
       Name  Flags
      frame  

  protected final int doInt(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)I
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 206
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getInt:(Lcom/oracle/truffle/api/frame/Frame;)I
            ireturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"frame.isInt(frameSlot)"})
    MethodParameters:
       Name  Flags
      frame  

  protected final double doDouble(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)D
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 211
            aload 1 /* frame */
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode.frameSlot:Lcom/oracle/truffle/api/frame/FrameSlot;
            invokeinterface com.oracle.truffle.api.frame.VirtualFrame.isInt:(Lcom/oracle/truffle/api/frame/FrameSlot;)Z
            ifeq 2
         1: .line 212
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getInt:(Lcom/oracle/truffle/api/frame/Frame;)I
            i2d
            dreturn
         2: .line 214
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getDouble:(Lcom/oracle/truffle/api/frame/Frame;)D
            dreturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    3     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"frame.isDouble(frameSlot) || frame.isInt(frameSlot)"})
    MethodParameters:
       Name  Flags
      frame  

  protected final java.lang.Object doObject(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 220
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getObject:(Lcom/oracle/truffle/api/frame/Frame;)Ljava/lang/Object;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"frame.isObject(frameSlot)"})
    MethodParameters:
       Name  Flags
      frame  

  protected final com.oracle.truffle.js.runtime.SafeInteger doSafeInteger(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Lcom/oracle/truffle/js/runtime/SafeInteger;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 225
            aload 0 /* this */
            aload 1 /* frame */
            invokespecial com.oracle.truffle.js.nodes.access.JSReadFrameSlotNode.getLong:(Lcom/oracle/truffle/api/frame/Frame;)J
            invokestatic com.oracle.truffle.js.runtime.SafeInteger.valueOf:(J)Lcom/oracle/truffle/js/runtime/SafeInteger;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"frame.isLong(frameSlot)"})
    MethodParameters:
       Name  Flags
      frame  

  public com.oracle.truffle.js.nodes.access.ScopeFrameNode getLevelFrameNode();
    descriptor: ()Lcom/oracle/truffle/js/nodes/access/ScopeFrameNode;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
         0: .line 230
            invokestatic com.oracle.truffle.js.nodes.access.ScopeFrameNode.createCurrent:()Lcom/oracle/truffle/js/nodes/access/ScopeFrameNode;
            areturn
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;

  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=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
         0: .line 235
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tJSReadCurrentFrameSlotNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.js.nodes.access.JSReadCurrentFrameSlotNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/nodes/access/JSReadCurrentFrameSlotNode;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  
}
SourceFile: "JSReadFrameSlotNode.java"