code: public static <T extends Model> T findFirst(String subQuery, Object... params) {
          return ModelDelegate.findFirst(Model.<T>modelClass(), subQuery, params);
      }
docs: Synonym of {@link #first(String, Object...)}.
  
  @param subQuery selection criteria, example:
  <pre>
  Person johnTheTeenager = Person.findFirst("name = ? and age &gt 13 and age &lt 19 order by age", "John")
  </pre>
  Sometimes a query might be just a clause like this:
  <pre>
  Person oldest = Person.findFirst("order by age desc")
  </pre>
  @param params list of parameters if question marks are used as placeholders
  @return a first result for this condition. May return null if nothing found.