includes/class-fs-plugin-updater.php
private function is_premium_plugin_active( $plugin_id = false ) {
            if ( $plugin_id != $this->_fs->get_id() ) {
                return $this->_fs->is_addon_activated( $plugin_id, true );
            }

            return is_plugin_active( $this->_fs->premium_plugin_basename() );
        }
private function is_premium_plugin_active( $plugin_id = false ) {
            if ( $plugin_id != $this->_fs->get_id() ) {
                return $this->_fs->is_addon_activated( $plugin_id, true );
            }

            return is_plugin_active( $this->_fs->premium_plugin_basename() );
        }
private function is_premium_plugin_active ( $ plugin_id = false ) { if ( $ plugin_id != $ this -> _fs -> get_id ( ) ) { return $ this -> _fs -> is_addon_activated ( $ plugin_id , true ) ; } return is_plugin_active ( $ this -> _fs -> premium_plugin_basename ( ) ) ; }
Check if a premium module version is already active.

@author Vova Feldman
@since  1.2.1.7

@param number|bool $plugin_id

@return bool
Check if a premium module version is already active .