public function leftJoinRelations($relations)
    {
        $relations = is_array($relations) ? $relations : func_get_args();

        return $this->joinRelations($relations, 'left');
    }
public function leftJoinRelations($relations)
    {
        $relations = is_array($relations) ? $relations : func_get_args();

        return $this->joinRelations($relations, 'left');
    }
public function leftJoinRelations ( $ relations ) { $ relations = is_array ( $ relations ) ? $ relations : func_get_args ( ) ; return $ this -> joinRelations ( $ relations , 'left' ) ; }
Left join related tables.

@param  array|string $relations
@return $this
Left join related tables .