public function fetchById($int_key_id)
    {
        $arr_results = $this->fetchByIds([$int_key_id]);
        if(count($arr_results) > 0) {
            return $arr_results[0];
        }
        return null;
    }
public function fetchById($int_key_id)
    {
        $arr_results = $this->fetchByIds([$int_key_id]);
        if(count($arr_results) > 0) {
            return $arr_results[0];
        }
        return null;
    }
public function fetchById ( $ int_key_id ) { $ arr_results = $ this -> fetchByIds ( [ $ int_key_id ] ) ; if ( count ( $ arr_results ) > 0 ) { return $ arr_results [ 0 ] ; } return null ; }
Fetch one entity by Key ID

@param $int_key_id
@return mixed
Fetch one entity by Key ID