Parse query and return :class:`.WStrictURIQuery` object

		:param query_str: query component of URI to parse
		:param specs: list of parameters specifications
		:param extra_parameters: whether parameters that was not specified in "specs" are allowed
		:return: WStrictURIQuery

def strict_parse(cls, query_str, *specs, extra_parameters=True):
		""" Parse query and return :class:`.WStrictURIQuery` object

		:param query_str: query component of URI to parse
		:param specs: list of parameters specifications
		:param extra_parameters: whether parameters that was not specified in "specs" are allowed
		:return: WStrictURIQuery
		"""
		plain_result = cls.parse(query_str)
		return WStrictURIQuery(plain_result, *specs, extra_parameters=extra_parameters)