https://www.graalvm.org/ 
abstract class com.oracle.truffle.api.dsl.test.NodeChildTest$BaseNode extends com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.dsl.test.NodeChildTest$BaseNode
  super_class: com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.NodeChildTest$BaseNode this
         0: .line 107
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.dsl.test.NodeChildTest$BaseNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/NodeChildTest$BaseNode;

  public abstract com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode getReceiver();
    descriptor: ()Lcom/oracle/truffle/api/dsl/test/TypeSystemTest$ValueNode;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode[] getArguments();
    descriptor: ()[Lcom/oracle/truffle/api/dsl/test/TypeSystemTest$ValueNode;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "NodeChildTest.java"
NestHost: com.oracle.truffle.api.dsl.test.NodeChildTest
InnerClasses:
  abstract BaseNode = com.oracle.truffle.api.dsl.test.NodeChildTest$BaseNode of com.oracle.truffle.api.dsl.test.NodeChildTest
  public ValueNode = com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode of com.oracle.truffle.api.dsl.test.TypeSystemTest
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.NodeChildren(value = {com.oracle.truffle.api.dsl.NodeChild(value = "receiver", type = Lcom/oracle/truffle/api/dsl/test/TypeSystemTest$ValueNode;), com.oracle.truffle.api.dsl.NodeChild(value = "arguments", type = [Lcom/oracle/truffle/api/dsl/test/TypeSystemTest$ValueNode;)})