<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def element_href_use_filter(name, _filter):
 """ Get element href using filter Filter should be a valid entry point value, ie host, router, network, single_fw, etc :param name: name of element :param _filter: filter type, unknown filter will result in no matches :return: element href (if found), else None """

    if name and _filter:
        element = fetch_meta_by_name(name, filter_context=_filter)
        if element.json:
            return element.json.pop().get('href')