https://www.graalvm.org/ 
class com.oracle.svm.hosted.substitute.SubstituteImpl extends com.oracle.svm.hosted.substitute.AnnotationImpl implements com.oracle.svm.core.annotate.Substitute
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.svm.hosted.substitute.SubstituteImpl
  super_class: com.oracle.svm.hosted.substitute.AnnotationImpl
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.hosted.substitute.SubstituteImpl this
         0: .line 324
            aload 0 /* this */
            invokespecial com.oracle.svm.hosted.substitute.AnnotationImpl.<init>:()V
            return
        end local 0 // com.oracle.svm.hosted.substitute.SubstituteImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/hosted/substitute/SubstituteImpl;

  public boolean polymorphicSignature();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.hosted.substitute.SubstituteImpl this
         0: .line 327
            iconst_0
            ireturn
        end local 0 // com.oracle.svm.hosted.substitute.SubstituteImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/hosted/substitute/SubstituteImpl;
}
SourceFile: "DeclarativeSubstitutionProcessor.java"