original_string: public function get_sql_where() {
          list($where, $params) = parent::get_sql_where();
          $where = preg_replace('/firstname/', 'u.firstname', $where);
          $where = preg_replace('/lastname/', 'u.lastname', $where);
          return [$where, $params];
      }
code: public function get_sql_where() {
          list($where, $params) = parent::get_sql_where();
          $where = preg_replace('/firstname/', 'u.firstname', $where);
          $where = preg_replace('/lastname/', 'u.lastname', $where);
          return [$where, $params];
      }
code_tokens: public function get_sql_where ( ) { list ( $ where , $ params ) = parent :: get_sql_where ( ) ; $ where = preg_replace ( '/firstname/' , 'u.firstname' , $ where ) ; $ where = preg_replace ( '/lastname/' , 'u.lastname' , $ where ) ; return [ $ where , $ params ] ; }
docstring: Get sql to add to where statement.
  
  @return string
docstring_tokens: Get sql to add to where statement .