: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
abstract function has_purchased_before();
* Check if current user classified as an agency.
* @author Vova Feldman (@svovaf)
abstract function is_agency();
* Check if current user classified as a developer.
* @author Vova Feldman (@svovaf)
abstract function is_developer();
* Check if current user classified as a business.
* @author Vova Feldman (@svovaf)
abstract function is_business();