https://www.graalvm.org/ 
final class com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode extends com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode
  super_class: com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode
{
  protected void <init>(com.oracle.truffle.js.runtime.builtins.JSFunctionData, com.oracle.truffle.js.nodes.function.FunctionRootNode);
    descriptor: (Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;Lcom/oracle/truffle/js/nodes/function/FunctionRootNode;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
        start local 1 // com.oracle.truffle.js.runtime.builtins.JSFunctionData functionData
        start local 2 // com.oracle.truffle.js.nodes.function.FunctionRootNode functionNode
         0: .line 163
            aload 0 /* this */
            aload 1 /* functionData */
            aload 2 /* functionNode */
            invokespecial com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode.<init>:(Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;Lcom/oracle/truffle/js/nodes/function/FunctionRootNode;)V
         1: .line 164
            return
        end local 2 // com.oracle.truffle.js.nodes.function.FunctionRootNode functionNode
        end local 1 // com.oracle.truffle.js.runtime.builtins.JSFunctionData functionData
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    2     0          this  Lcom/oracle/truffle/js/nodes/function/JSFunctionExpressionNode$AutonomousFunctionExpressionNode;
            0    2     1  functionData  Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;
            0    2     2  functionNode  Lcom/oracle/truffle/js/nodes/function/FunctionRootNode;
    MethodParameters:
              Name  Flags
      functionData  
      functionNode  

  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=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 168
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode.functionData:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;
            invokevirtual com.oracle.truffle.js.runtime.builtins.JSFunctionData.getContext:()Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.getRealm:()Lcom/oracle/truffle/js/runtime/JSRealm;
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode.functionData:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;
            invokestatic com.oracle.truffle.js.runtime.builtins.JSFunction.create:(Lcom/oracle/truffle/js/runtime/JSRealm;Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;)Lcom/oracle/truffle/api/object/DynamicObject;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/function/JSFunctionExpressionNode$AutonomousFunctionExpressionNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    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=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
        start local 1 // java.util.Set materializedTags
         0: .line 173
            new com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode.functionData:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode.functionNode:Lcom/oracle/truffle/js/nodes/function/FunctionRootNode;
            invokespecial com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode.<init>:(Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;Lcom/oracle/truffle/js/nodes/function/FunctionRootNode;)V
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/nodes/function/JSFunctionExpressionNode$AutonomousFunctionExpressionNode;
            0    1     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
                  Name  Flags
      materializedTags  
}
SourceFile: "JSFunctionExpressionNode.java"
NestHost: com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode
InnerClasses:
  private final AutonomousFunctionExpressionNode = com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode$AutonomousFunctionExpressionNode of com.oracle.truffle.js.nodes.function.JSFunctionExpressionNode