/** Flush the database and reload base fixtures.
  *
  * @param bool $rebuild
  *  true:   The database will be dropped and rebuilt.
  *  false:  The method will try just to flush the data.
  *
  * Note that the first time flushDatabase() is called (per execution), the
  *  database will be rebuilt regardless of $rebuild.
  *
  * @return static
  */
 public function flushDatabase($rebuild = false)
 {
     $this->_db->flushDatabase($rebuild);
     return $this;
 }