public function getKey($refers_to = false) {
		if ($refers_to === true && $this->refers_to !== false) {
			return $this->refers_to;
		}

		return $this->key;
	}
public function getKey($refers_to = false) {
		if ($refers_to === true && $this->refers_to !== false) {
			return $this->refers_to;
		}

		return $this->key;
	}
public function getKey ( $ refers_to = false ) { if ( $ refers_to === true && $ this -> refers_to !== false ) { return $ this -> refers_to ; } return $ this -> key ; }
Get column key

@param bool $refers_to

@return string
Get column key