tag.php
public function isId($id)
    {
        for ($i = 0, $count = count($this->widgets); $i < $count; $i++) {
            if ($this->widgets[$i]->isId($id)) {
                return true;
            }
        }

        return false;
    }
public function isId($id)
    {
        for ($i = 0, $count = count($this->widgets); $i < $count; $i++) {
            if ($this->widgets[$i]->isId($id)) {
                return true;
            }
        }

        return false;
    }
Scans the widgets for one with the appropriate ID field.

@param string $id        ID value to try.

@return bool          True if matched.