https://www.graalvm.org/ 
public interface com.oracle.svm.util.TransformerInterface
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.svm.util.TransformerInterface
  super_class: java.lang.Object
{
  public abstract byte[] apply(java.lang.String, java.lang.ClassLoader, java.lang.String, byte[]);
    descriptor: (Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;[B)[B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
                 Name  Flags
      moduleName       
      loader           
      className        
      classfileBuffer  
}
SourceFile: "TransformerInterface.java"
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()