function get_id($suffix = '') {
        $ret = $this->id;
        if (!empty($suffix)) {
            $ret .= $suffix;
        }

        return $ret;
    }
function get_id($suffix = '') {
        $ret = $this->id;
        if (!empty($suffix)) {
            $ret .= $suffix;
        }

        return $ret;
    }
Returns plug-in's ID (with optional suffix).

@since 0.1.3
@param string $suffix (Optional).
@return string