code: private boolean isGregorianCalendarBooleanConstructor(MethodInsnNode targetMethod) {
      return targetMethod.owner.equals("java/util/GregorianCalendar") &&
          targetMethod.name.equals("<init>") &&
          targetMethod.desc.equals("(Z)V");
    }
docs: Verifies if the @targetMethod is a `<init>(boolean)` constructor for
  {@link java.util.GregorianCalendar}.