https://www.graalvm.org/ 
final class com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember this
         0: .line 248
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/interop/ScopeVariables$ReadMember;

  static java.lang.Object doReadThis(com.oracle.truffle.js.runtime.interop.ScopeVariables, java.lang.String);
    descriptor: (Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
        start local 1 // java.lang.String member
         0: .line 253
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.frame:Lcom/oracle/truffle/api/frame/Frame;
            ifnull 2
         1: .line 254
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.frame:Lcom/oracle/truffle/api/frame/Frame;
            invokestatic com.oracle.truffle.js.runtime.interop.ScopeVariables.getThis:(Lcom/oracle/truffle/api/frame/Frame;)Ljava/lang/Object;
            areturn
         2: .line 256
      StackMap locals:
      StackMap stack:
            aload 1 /* member */
            invokestatic com.oracle.truffle.api.interop.UnknownIdentifierException.create:(Ljava/lang/String;)Lcom/oracle/truffle/api/interop/UnknownIdentifierException;
            athrow
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0  receiver  Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;
            0    3     1    member  Ljava/lang/String;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"RECEIVER_MEMBER.equals(member)"})
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
          Name  Flags
      receiver  
      member    

  static java.lang.Object doCached(com.oracle.truffle.js.runtime.interop.ScopeVariables, java.lang.String, java.lang.String, com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;Ljava/lang/String;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
        start local 1 // java.lang.String member
        start local 2 // java.lang.String cachedMember
        start local 3 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
         0: .line 265
            aload 0 /* receiver */
            aload 2 /* cachedMember */
            aload 3 /* readNode */
            invokestatic com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember.doRead:(Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Ljava/lang/Object;
            areturn
        end local 3 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
        end local 2 // java.lang.String cachedMember
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    1     0      receiver  Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;
            0    1     1        member  Ljava/lang/String;
            0    1     2  cachedMember  Ljava/lang/String;
            0    1     3      readNode  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"cachedMember.equals(member)", "!RECEIVER_MEMBER.equals(cachedMember)"}, limit = "LIMIT")
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
      2:
        com.oracle.truffle.api.dsl.Cached(value = "member")
      3:
        com.oracle.truffle.api.dsl.Cached(value = "findReadNode(member, receiver.frame, receiver.blockOrRoot)", adopt = false)
    MethodParameters:
              Name  Flags
      receiver      
      member        
      cachedMember  
      readNode      

  static java.lang.Object doGeneric(com.oracle.truffle.js.runtime.interop.ScopeVariables, java.lang.String);
    descriptor: (Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
        start local 1 // java.lang.String member
         0: .line 271
            aload 1 /* member */
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.frame:Lcom/oracle/truffle/api/frame/Frame;
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.blockOrRoot:Lcom/oracle/truffle/api/nodes/Node;
            invokestatic com.oracle.truffle.js.runtime.interop.ScopeVariables.findReadNode:(Ljava/lang/String;Lcom/oracle/truffle/api/frame/Frame;Lcom/oracle/truffle/api/nodes/Node;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            astore 2 /* readNode */
        start local 2 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
         1: .line 272
            aload 0 /* receiver */
            aload 1 /* member */
            aload 2 /* readNode */
            invokestatic com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember.doRead:(Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Ljava/lang/Object;
            areturn
        end local 2 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0  receiver  Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;
            0    2     1    member  Ljava/lang/String;
            1    2     2  readNode  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(replaces = {"doCached"})
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
          Name  Flags
      receiver  
      member    

  private static java.lang.Object doRead(com.oracle.truffle.js.runtime.interop.ScopeVariables, java.lang.String, com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;Ljava/lang/String;Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Ljava/lang/Object;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
        start local 1 // java.lang.String member
        start local 2 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
         0: .line 276
            aload 2 /* readNode */
            ifnonnull 2
         1: .line 277
            aload 1 /* member */
            invokestatic com.oracle.truffle.api.interop.UnknownIdentifierException.create:(Ljava/lang/String;)Lcom/oracle/truffle/api/interop/UnknownIdentifierException;
            athrow
         2: .line 279
      StackMap locals:
      StackMap stack:
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.frame:Lcom/oracle/truffle/api/frame/Frame;
            ifnonnull 4
         3: .line 280
            getstatic com.oracle.truffle.js.runtime.objects.Undefined.instance:Lcom/oracle/truffle/js/runtime/objects/JSDynamicObject;
            areturn
         4: .line 282
      StackMap locals:
      StackMap stack:
            aload 2 /* readNode */
            aload 0 /* receiver */
            getfield com.oracle.truffle.js.runtime.interop.ScopeVariables.frame:Lcom/oracle/truffle/api/frame/Frame;
            checkcast com.oracle.truffle.api.frame.VirtualFrame
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.execute:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
            areturn
        end local 2 // com.oracle.truffle.js.nodes.JavaScriptNode readNode
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.js.runtime.interop.ScopeVariables receiver
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0  receiver  Lcom/oracle/truffle/js/runtime/interop/ScopeVariables;
            0    5     1    member  Ljava/lang/String;
            0    5     2  readNode  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    MethodParameters:
          Name  Flags
      receiver  
      member    
      readNode  
}
SourceFile: "ScopeVariables.java"
NestHost: com.oracle.truffle.js.runtime.interop.ScopeVariables
InnerClasses:
  public abstract TruffleBoundary = com.oracle.truffle.api.CompilerDirectives$TruffleBoundary of com.oracle.truffle.api.CompilerDirectives
  final ReadMember = com.oracle.truffle.js.runtime.interop.ScopeVariables$ReadMember of com.oracle.truffle.js.runtime.interop.ScopeVariables
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()