https://www.graalvm.org/ 
public abstract class com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode extends com.oracle.truffle.js.nodes.JavaScriptBaseNode
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode
  super_class: com.oracle.truffle.js.nodes.JavaScriptBaseNode
{
  private com.oracle.truffle.js.nodes.access.PropertyGetNode getPromiseResult;
    descriptor: Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  private static final com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode UNCACHED;
    descriptor: Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 59
            aconst_null
            invokestatic com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.create:(Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            putstatic com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.UNCACHED:Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
        start local 1 // com.oracle.truffle.js.runtime.JSContext context
         0: .line 61
            aload 0 /* this */
            invokespecial com.oracle.truffle.js.nodes.JavaScriptBaseNode.<init>:()V
         1: .line 62
            aload 1 /* context */
            ifnull 3
         2: .line 63
            aload 0 /* this */
            getstatic com.oracle.truffle.js.runtime.builtins.JSPromise.PROMISE_RESULT:Lcom/oracle/truffle/api/object/HiddenKey;
            aload 1 /* context */
            invokestatic com.oracle.truffle.js.nodes.access.PropertyGetNode.createGetHidden:(Lcom/oracle/truffle/api/object/HiddenKey;Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
            putfield com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.getPromiseResult:Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
         3: .line 65
      StackMap locals: com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode com.oracle.truffle.js.runtime.JSContext
      StackMap stack:
            return
        end local 1 // com.oracle.truffle.js.runtime.JSContext context
        end local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            0    4     1  context  Lcom/oracle/truffle/js/runtime/JSContext;
    MethodParameters:
         Name  Flags
      context  

  public static com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode create(com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
         0: .line 68
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tUnwrapPromiseNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
         Name  Flags
      context  

  public final java.lang.Object execute(com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;)Ljava/lang/Object;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
        start local 1 // com.oracle.truffle.api.object.DynamicObject promise
         0: .line 72
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.getPromiseResult:Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
            ifnonnull 2
         1: .line 73
            aload 0 /* this */
            aload 1 /* promise */
            invokevirtual com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.doUncached:(Lcom/oracle/truffle/api/object/DynamicObject;)Ljava/lang/Object;
            areturn
         2: .line 75
      StackMap locals:
      StackMap stack:
            aload 1 /* promise */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSPromise.getPromiseState:(Lcom/oracle/truffle/api/object/DynamicObject;)I
            istore 2 /* promiseState */
        start local 2 // int promiseState
         3: .line 76
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.getPromiseResult:Lcom/oracle/truffle/js/nodes/access/PropertyGetNode;
            aload 1 /* promise */
            invokevirtual com.oracle.truffle.js.nodes.access.PropertyGetNode.getValue:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 3 /* promiseResult */
        start local 3 // java.lang.Object promiseResult
         4: .line 77
            aload 0 /* this */
            aload 1 /* promise */
            iload 2 /* promiseState */
            aload 3 /* promiseResult */
            invokevirtual com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.execute:(Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 3 // java.lang.Object promiseResult
        end local 2 // int promiseState
        end local 1 // com.oracle.truffle.api.object.DynamicObject promise
        end local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    5     0           this  Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            0    5     1        promise  Lcom/oracle/truffle/api/object/DynamicObject;
            3    5     2   promiseState  I
            4    5     3  promiseResult  Ljava/lang/Object;
    MethodParameters:
         Name  Flags
      promise  

  private java.lang.Object doUncached(com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;)Ljava/lang/Object;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
        start local 1 // com.oracle.truffle.api.object.DynamicObject promise
         0: .line 82
            aload 0 /* this */
            aload 1 /* promise */
            aload 1 /* promise */
            invokestatic com.oracle.truffle.js.runtime.builtins.JSPromise.getPromiseState:(Lcom/oracle/truffle/api/object/DynamicObject;)I
            aload 1 /* promise */
            getstatic com.oracle.truffle.js.runtime.builtins.JSPromise.PROMISE_RESULT:Lcom/oracle/truffle/api/object/HiddenKey;
            invokestatic com.oracle.truffle.js.runtime.objects.JSDynamicObject.getOrNull:(Lcom/oracle/truffle/api/object/DynamicObject;Ljava/lang/Object;)Ljava/lang/Object;
            invokevirtual com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.execute:(Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 1 // com.oracle.truffle.api.object.DynamicObject promise
        end local 0 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            0    1     1  promise  Lcom/oracle/truffle/api/object/DynamicObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
         Name  Flags
      promise  

  protected abstract java.lang.Object execute(com.oracle.truffle.api.object.DynamicObject, int, java.lang.Object);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    MethodParameters:
               Name  Flags
      promise        
      promiseState   
      promiseResult  

  protected static java.lang.Object fulfilled(com.oracle.truffle.api.object.DynamicObject, int, java.lang.Object);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
    flags: (0x000c) ACC_PROTECTED, ACC_STATIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.object.DynamicObject promise
        start local 1 // int promiseState
        start local 2 // java.lang.Object promiseResult
         0: .line 90
            aload 2 /* promiseResult */
            areturn
        end local 2 // java.lang.Object promiseResult
        end local 1 // int promiseState
        end local 0 // com.oracle.truffle.api.object.DynamicObject promise
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0        promise  Lcom/oracle/truffle/api/object/DynamicObject;
            0    1     1   promiseState  I
            0    1     2  promiseResult  Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"promiseState == FULFILLED"})
    MethodParameters:
               Name  Flags
      promise        
      promiseState   
      promiseResult  

  protected static java.lang.Object rejected(com.oracle.truffle.api.object.DynamicObject, int, java.lang.Object);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
    flags: (0x000c) ACC_PROTECTED, ACC_STATIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.object.DynamicObject promise
        start local 1 // int promiseState
        start local 2 // java.lang.Object promiseResult
         0: .line 96
            aload 2 /* promiseResult */
            invokestatic com.oracle.truffle.js.runtime.UserScriptException.create:(Ljava/lang/Object;)Lcom/oracle/truffle/js/runtime/UserScriptException;
            athrow
        end local 2 // java.lang.Object promiseResult
        end local 1 // int promiseState
        end local 0 // com.oracle.truffle.api.object.DynamicObject promise
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0        promise  Lcom/oracle/truffle/api/object/DynamicObject;
            0    1     1   promiseState  I
            0    1     2  promiseResult  Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"promiseState == REJECTED"})
    MethodParameters:
               Name  Flags
      promise        
      promiseState   
      promiseResult  

  protected static java.lang.Object pending(com.oracle.truffle.api.object.DynamicObject, int, java.lang.Object);
    descriptor: (Lcom/oracle/truffle/api/object/DynamicObject;ILjava/lang/Object;)Ljava/lang/Object;
    flags: (0x000c) ACC_PROTECTED, ACC_STATIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.object.DynamicObject promise
        start local 1 // int promiseState
        start local 2 // java.lang.Object promiseResult
         0: .line 102
            ldc "Attempt to unwrap pending promise"
            invokestatic com.oracle.truffle.js.runtime.Errors.createTypeError:(Ljava/lang/String;)Lcom/oracle/truffle/js/runtime/JSException;
            athrow
        end local 2 // java.lang.Object promiseResult
        end local 1 // int promiseState
        end local 0 // com.oracle.truffle.api.object.DynamicObject promise
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0        promise  Lcom/oracle/truffle/api/object/DynamicObject;
            0    1     1   promiseState  I
            0    1     2  promiseResult  Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"promiseState == PENDING"})
    MethodParameters:
               Name  Flags
      promise        
      promiseState   
      promiseResult  

  public static com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode getUncached();
    descriptor: ()Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 106
            getstatic com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.UNCACHED:Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "UnwrapPromiseNode.java"
InnerClasses:
  public abstract TruffleBoundary = com.oracle.truffle.api.CompilerDirectives$TruffleBoundary of com.oracle.truffle.api.CompilerDirectives
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.ImportStatic(value = {Lcom/oracle/truffle/js/runtime/builtins/JSPromise;})