docs: static <J> MethodId<J> MethodId(String name) {
  		for (Method m : JavacTreeMaker.class.getDeclaredMethods()) {
  			if (m.getName().equals(name)) {
  				@SuppressWarnings("unchecked") Class<J> r = (Class<J>) m.getReturnType();
  				Class<?>[] p = m.getParameterTypes();
  				return new MethodId<J>(TreeMaker.class, name, r, p);
  			}
  		}
  		
  		throw new InternalError("Not found: " + name);
  	}