code: def count(self, value):
          
          from pcapkit.protocols.protocol import Protocol
          try:
              flag = issubclass(value, Protocol)
          except TypeError:
              flag = issubclass(type(value), Protocol)
          if flag or isinstance(value, Protocol):
              value = value.__index__()
              if isinstance(value, tuple):
                  value = r'|'.join(value)
  
          with contextlib.suppress(Exception):
              return sum(1 for data in self.__data__ if re.fullmatch(value, data, re.IGNORECASE) is not None)
          return 0
docs: S.count(value) -> integer -- return number of occurrences of value