docs: def add_filter(self, entry):
          """Parse and store the filter field"""
          entry = entry[10:-1]
          info = entry.split(',')
          if len(info) < 2:
              return False
          for v in info:
              key, value = v.split('=', 1)
              if key == 'ID':
                  self.filter[value] = {}
                  id_ = value
              elif key == 'Description':
                  self.filter[id_]['description'] = value
                  if len(info) > 2:
                      self.info[id_]['description'] += '; '.join(info[2:])
          return True