code: def validate(self):
          
          val = self._condition.lower()
          if val and val[0] in "+-":
              val = val[1:]
  
          matcher = PatternFilter
          if not val or val.startswith('/') and val.endswith('/'):
              pass
          elif val.replace('.', '0').isdigit():
              matcher = FloatFilter
          elif self._condition in (TRUE | FALSE):
              matcher = BoolFilter
          elif any(val.endswith(i) for i in ByteSizeFilter.UNITS) and val[:-1].isdigit():
              matcher = ByteSizeFilter
          elif TimeFilter.TIMEDELTA_RE.match(val):
              matcher = TimeFilter
  
          self._inner = matcher(self._name, self._condition)
docs: Validate filter condition (template method).