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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_provider(self, module_member: str) -> Optional['ProviderResource']: """ Fetches the provider for the given module member, if this resource has been provided a specific provider for the given module member. Returns None if no provider was provided. :param str module_member: The requested module member. :return: The :class:`ProviderResource` associated with the given module member, or None if one does not exist. :rtype: Optional[ProviderResource] """

        components = module_member.split(":")
        if len(components) != 3:
            return None

        [pkg, _, _] = components
        return self._providers.get(pkg)