https://www.graalvm.org/ 
abstract class com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 extends com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1
  super_class: com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 this
         0: .line 73
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/UnsupportedSpecializationTest$Unsupported1;

  public int doInteger(int);
    descriptor: (I)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 this
        start local 1 // int a
         0: .line 77
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
        end local 1 // int a
        end local 0 // com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/UnsupportedSpecializationTest$Unsupported1;
            0    1     1     a  I
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization()
    MethodParameters:
      Name  Flags
      a     
}
SourceFile: "UnsupportedSpecializationTest.java"
NestHost: com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest
InnerClasses:
  public ValueNode = com.oracle.truffle.api.dsl.test.TypeSystemTest$ValueNode of com.oracle.truffle.api.dsl.test.TypeSystemTest
  abstract Unsupported1 = com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest$Unsupported1 of com.oracle.truffle.api.dsl.test.UnsupportedSpecializationTest
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.NodeChild(value = "a")