code: public static final <T extends Model> T find(Class<T> cls, Long id) {
  		return Select.from(cls).where(_ID + "=?", id).fetchSingle();
  	}
docs: <p>
  Find a record by id.
  </p>
  
  @param cls The model class.
  @param id  The model Id.
  @return The query result.