private Set<String> populateExistingMethods() {
    final Set<String> existingMethods = new HashSet<>();
    myOriginalClass.accept(new ClassVisitor(API_VERSION) {
      @Override
      public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
        existingMethods.add(name);
        return null;
      }
    }, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
    return existingMethods;
  }
private Set<String> populateExistingMethods()