Papi_Core_Conditional_Rule::setup_source PHP Method

    public function setup_source($value)
    {
        if (is_array($value) && count($value) === 2 && is_object($value[0]) && is_string($value[1])) {
            return sprintf('%s#%s', get_class($value[0]), $value[1]);
        }
        if (is_string($value) && is_callable($value)) {
            return $value;
        }
        // No support for closure.
        if (is_object($value) && $value instanceof Closure) {
            return '';
        }
        return $value;
    }