https://www.graalvm.org/ 
class com.oracle.truffle.api.nodes.NodeClass$1$1 implements java.security.PrivilegedAction<com.oracle.truffle.api.nodes.NodeClass>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.nodes.NodeClass$1$1
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.nodes.NodeClass$1 this$1;
    descriptor: Lcom/oracle/truffle/api/nodes/NodeClass$1;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final java.lang.Class val$clazz;
    descriptor: Ljava/lang/Class;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.nodes.NodeClass$1, java.lang.Class);
    descriptor: (Lcom/oracle/truffle/api/nodes/NodeClass$1;Ljava/lang/Class;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.nodes.NodeClass$1$1 this
         0: .line 57
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.nodes.NodeClass$1$1.this$1:Lcom/oracle/truffle/api/nodes/NodeClass$1;
            aload 0 /* this */
            aload 2
            putfield com.oracle.truffle.api.nodes.NodeClass$1$1.val$clazz:Ljava/lang/Class;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.nodes.NodeClass$1$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/nodes/NodeClass$1$1;
    MethodParameters:
           Name  Flags
      this$0     final
      val$clazz  final

  public com.oracle.truffle.api.nodes.NodeClass run();
    descriptor: ()Lcom/oracle/truffle/api/nodes/NodeClass;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.nodes.NodeClass$1$1 this
         0: .line 59
            new com.oracle.truffle.api.nodes.NodeClassImpl
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.api.nodes.NodeClass$1$1.val$clazz:Ljava/lang/Class;
            ldc Lcom/oracle/truffle/api/nodes/Node;
            invokevirtual java.lang.Class.asSubclass:(Ljava/lang/Class;)Ljava/lang/Class;
            invokespecial com.oracle.truffle.api.nodes.NodeClassImpl.<init>:(Ljava/lang/Class;)V
            areturn
        end local 0 // com.oracle.truffle.api.nodes.NodeClass$1$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/nodes/NodeClass$1$1;

  public java.lang.Object run();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.oracle.truffle.api.nodes.NodeClass$1$1.run:()Lcom/oracle/truffle/api/nodes/NodeClass;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/security/PrivilegedAction<Lcom/oracle/truffle/api/nodes/NodeClass;>;
SourceFile: "NodeClass.java"
EnclosingMethod: com.oracle.truffle.api.nodes.NodeClass$1.computeValue:(Ljava/lang/Class;)Lcom/oracle/truffle/api/nodes/NodeClass;
NestHost: com.oracle.truffle.api.nodes.NodeClass
InnerClasses:
  com.oracle.truffle.api.nodes.NodeClass$1
  com.oracle.truffle.api.nodes.NodeClass$1$1