https://www.graalvm.org/ 
class com.oracle.truffle.js.nodes.control.AwaitNode$1AwaitFulfilledRootNode extends com.oracle.truffle.js.nodes.control.AwaitNode$AwaitSettledRootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.control.AwaitNode$1AwaitFulfilledRootNode
  super_class: com.oracle.truffle.js.nodes.control.AwaitNode$AwaitSettledRootNode
{
  void <init>(com.oracle.truffle.js.runtime.JSContext);
    descriptor: (Lcom/oracle/truffle/js/runtime/JSContext;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.control.AwaitNode$1AwaitFulfilledRootNode this
         0: .line 364
            aload 0 /* this */
            aload 1
            iconst_0
            invokespecial com.oracle.truffle.js.nodes.control.AwaitNode$AwaitSettledRootNode.<init>:(Lcom/oracle/truffle/js/runtime/JSContext;Z)V
         1: .line 365
            return
        end local 0 // com.oracle.truffle.js.nodes.control.AwaitNode$1AwaitFulfilledRootNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/js/nodes/control/AwaitNode$1AwaitFulfilledRootNode;
    MethodParameters:
             Name  Flags
      val$context  final
}
SourceFile: "AwaitNode.java"
EnclosingMethod: com.oracle.truffle.js.nodes.control.AwaitNode.createAwaitFulfilledImpl:(Lcom/oracle/truffle/js/runtime/JSContext;)Lcom/oracle/truffle/js/runtime/builtins/JSFunctionData;
NestHost: com.oracle.truffle.js.nodes.control.AwaitNode
InnerClasses:
  AwaitFulfilledRootNode = com.oracle.truffle.js.nodes.control.AwaitNode$1AwaitFulfilledRootNode
  AwaitSettledRootNode = com.oracle.truffle.js.nodes.control.AwaitNode$AwaitSettledRootNode of com.oracle.truffle.js.nodes.control.AwaitNode