docs: def freemem(**kwargs):
      '''
      Return an int representing the amount of memory (in MB) that has not
      been given to virtual machines on this node
  
      :param connection: libvirt connection URI, overriding defaults
  
          .. versionadded:: 2019.2.0
      :param username: username to connect with, overriding defaults
  
          .. versionadded:: 2019.2.0
      :param password: password to connect with, overriding defaults
  
          .. versionadded:: 2019.2.0
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' virt.freemem
      '''
      conn = __get_conn(**kwargs)
      mem = _freemem(conn)
      conn.close()
      return mem