def by_identity_id(self,identity_id: str) -> IdentityItemRequestBuilder:
        """
        Provides operations to manage the members property of the microsoft.graph.externalConnectors.externalGroup entity.
        param identity_id: The unique identifier of identity
        Returns: IdentityItemRequestBuilder
        """
        if identity_id is None:
            raise TypeError("identity_id cannot be null.")
        from .item.identity_item_request_builder import IdentityItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["identity%2Did"] = identity_id
        return IdentityItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the members property of the microsoft.graph.externalConnectors.externalGroup entity.
        param identity_id: The unique identifier of identity
        Returns: IdentityItemRequestBuilder
        
msgraph/generated/connections/item/groups/item/members/members_request_builder.py