https://www.graalvm.org/ 
public final class com.oracle.truffle.js.runtime.interop.InteropAsyncFunction extends com.oracle.truffle.js.runtime.interop.InteropFunction
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.runtime.interop.InteropAsyncFunction
  super_class: com.oracle.truffle.js.runtime.interop.InteropFunction
{
  final com.oracle.truffle.js.runtime.builtins.JSFunctionObject function;
    descriptor: Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
    flags: (0x0010) ACC_FINAL

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 66
            ldc Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(com.oracle.truffle.js.runtime.builtins.JSFunctionObject);
    descriptor: (Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
        start local 1 // com.oracle.truffle.js.runtime.builtins.JSFunctionObject function
         0: .line 71
            aload 0 /* this */
            aload 1 /* function */
            invokespecial com.oracle.truffle.js.runtime.interop.InteropFunction.<init>:(Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;)V
         1: .line 72
            aload 0 /* this */
            aload 1 /* function */
            putfield com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.function:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
         2: .line 73
            return
        end local 1 // com.oracle.truffle.js.runtime.builtins.JSFunctionObject function
        end local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
            0    3     1  function  Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
    MethodParameters:
          Name  Flags
      function  

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
         0: .line 77
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.function:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
            invokevirtual java.lang.Object.hashCode:()I
            ireturn
        end local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
        start local 1 // java.lang.Object obj
         0: .line 82
            aload 0 /* this */
            aload 1 /* obj */
            if_acmpne 2
         1: .line 83
            iconst_1
            ireturn
         2: .line 84
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            instanceof com.oracle.truffle.js.runtime.interop.InteropAsyncFunction
            ifeq 5
         3: .line 85
            aload 1 /* obj */
            checkcast com.oracle.truffle.js.runtime.interop.InteropAsyncFunction
            astore 2 /* other */
        start local 2 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction other
         4: .line 86
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.function:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
            aload 2 /* other */
            getfield com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.function:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ireturn
        end local 2 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction other
         5: .line 88
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.lang.Object obj
        end local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    6     0   this  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
            0    6     1    obj  Ljava/lang/Object;
            4    5     2  other  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
    MethodParameters:
      Name  Flags
      obj   

  boolean isExecutable();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
         0: .line 95
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()

  java.lang.Object execute(java.lang.Object[], com.oracle.truffle.js.lang.JavaScriptLanguage, com.oracle.truffle.js.runtime.JSRealm, com.oracle.truffle.js.nodes.interop.JSInteropExecuteNode, com.oracle.truffle.js.nodes.interop.ExportValueNode, com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode);
    descriptor: ([Ljava/lang/Object;Lcom/oracle/truffle/js/lang/JavaScriptLanguage;Lcom/oracle/truffle/js/runtime/JSRealm;Lcom/oracle/truffle/js/nodes/interop/JSInteropExecuteNode;Lcom/oracle/truffle/js/nodes/interop/ExportValueNode;Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;)Ljava/lang/Object;
    flags: (0x0000) 
    Code:
      stack=4, locals=9, args_size=7
        start local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
        start local 1 // java.lang.Object[] arguments
        start local 2 // com.oracle.truffle.js.lang.JavaScriptLanguage language
        start local 3 // com.oracle.truffle.js.runtime.JSRealm realm
        start local 4 // com.oracle.truffle.js.nodes.interop.JSInteropExecuteNode callNode
        start local 5 // com.oracle.truffle.js.nodes.interop.ExportValueNode exportNode
        start local 6 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode unwrapPromise
         0: .line 105
            getstatic com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.$assertionsDisabled:Z
            ifne 1
            aload 3 /* realm */
            invokevirtual com.oracle.truffle.js.runtime.JSRealm.getContext:()Lcom/oracle/truffle/js/runtime/JSContext;
            invokevirtual com.oracle.truffle.js.runtime.JSContext.getContextOptions:()Lcom/oracle/truffle/js/runtime/JSContextOptions;
            invokevirtual com.oracle.truffle.js.runtime.JSContextOptions.interopCompletePromises:()Z
            ifne 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 106
      StackMap locals:
      StackMap stack:
            aload 2 /* language */
            aload 3 /* realm */
            invokevirtual com.oracle.truffle.js.lang.JavaScriptLanguage.interopBoundaryEnter:(Lcom/oracle/truffle/js/runtime/JSRealm;)V
         2: .line 109
            aload 4 /* callNode */
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.interop.InteropAsyncFunction.function:Lcom/oracle/truffle/js/runtime/builtins/JSFunctionObject;
            getstatic com.oracle.truffle.js.runtime.objects.Undefined.instance:Lcom/oracle/truffle/js/runtime/objects/JSDynamicObject;
            aload 1 /* arguments */
            invokevirtual com.oracle.truffle.js.nodes.interop.JSInteropExecuteNode.execute:(Lcom/oracle/truffle/api/object/DynamicObject;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            astore 7 /* result */
        start local 7 // java.lang.Object result
         3: .line 110
            aload 5 /* exportNode */
            aload 7 /* result */
            invokevirtual com.oracle.truffle.js.nodes.interop.ExportValueNode.execute:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 7 /* result */
         4: .line 111
            goto 8
        end local 7 // java.lang.Object result
      StackMap locals:
      StackMap stack: java.lang.Throwable
         5: astore 8
         6: .line 112
            aload 2 /* language */
            aload 3 /* realm */
            invokevirtual com.oracle.truffle.js.lang.JavaScriptLanguage.interopBoundaryExit:(Lcom/oracle/truffle/js/runtime/JSRealm;)V
         7: .line 113
            aload 8
            athrow
        start local 7 // java.lang.Object result
         8: .line 112
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 2 /* language */
            aload 3 /* realm */
            invokevirtual com.oracle.truffle.js.lang.JavaScriptLanguage.interopBoundaryExit:(Lcom/oracle/truffle/js/runtime/JSRealm;)V
         9: .line 119
            aload 6 /* unwrapPromise */
            aload 7 /* result */
            checkcast com.oracle.truffle.api.object.DynamicObject
            invokevirtual com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode.execute:(Lcom/oracle/truffle/api/object/DynamicObject;)Ljava/lang/Object;
            areturn
        end local 7 // java.lang.Object result
        end local 6 // com.oracle.truffle.js.nodes.promise.UnwrapPromiseNode unwrapPromise
        end local 5 // com.oracle.truffle.js.nodes.interop.ExportValueNode exportNode
        end local 4 // com.oracle.truffle.js.nodes.interop.JSInteropExecuteNode callNode
        end local 3 // com.oracle.truffle.js.runtime.JSRealm realm
        end local 2 // com.oracle.truffle.js.lang.JavaScriptLanguage language
        end local 1 // java.lang.Object[] arguments
        end local 0 // com.oracle.truffle.js.runtime.interop.InteropAsyncFunction this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   10     0           this  Lcom/oracle/truffle/js/runtime/interop/InteropAsyncFunction;
            0   10     1      arguments  [Ljava/lang/Object;
            0   10     2       language  Lcom/oracle/truffle/js/lang/JavaScriptLanguage;
            0   10     3          realm  Lcom/oracle/truffle/js/runtime/JSRealm;
            0   10     4       callNode  Lcom/oracle/truffle/js/nodes/interop/JSInteropExecuteNode;
            0   10     5     exportNode  Lcom/oracle/truffle/js/nodes/interop/ExportValueNode;
            0   10     6  unwrapPromise  Lcom/oracle/truffle/js/nodes/promise/UnwrapPromiseNode;
            3    5     7         result  Ljava/lang/Object;
            8   10     7         result  Ljava/lang/Object;
      Exception table:
        from    to  target  type
           2     5       5  any
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
        com.oracle.truffle.api.dsl.CachedLanguage()
      2:
        com.oracle.truffle.api.dsl.CachedContext(value = Lcom/oracle/truffle/js/lang/JavaScriptLanguage;)
      3:
        com.oracle.truffle.api.dsl.Cached()
      4:
        com.oracle.truffle.api.dsl.Cached()
      5:
        com.oracle.truffle.api.dsl.Cached(value = "create(realm.getContext())")
    MethodParameters:
               Name  Flags
      arguments      
      language       
      realm          
      callNode       
      exportNode     
      unwrapPromise  
}
SourceFile: "InteropAsyncFunction.java"
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportLibrary(value = Lcom/oracle/truffle/api/interop/InteropLibrary;, delegateTo = "function")
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.ImportStatic(value = {Lcom/oracle/truffle/js/runtime/JSConfig;})