def by_virtual_event_session_id(self,virtual_event_session_id: str) -> VirtualEventSessionItemRequestBuilder:
        """
        Provides operations to manage the sessions property of the microsoft.graph.virtualEventRegistration entity.
        param virtual_event_session_id: The unique identifier of virtualEventSession
        Returns: VirtualEventSessionItemRequestBuilder
        """
        if virtual_event_session_id is None:
            raise TypeError("virtual_event_session_id cannot be null.")
        from .item.virtual_event_session_item_request_builder import VirtualEventSessionItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["virtualEventSession%2Did"] = virtual_event_session_id
        return VirtualEventSessionItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the sessions property of the microsoft.graph.virtualEventRegistration entity.
        param virtual_event_session_id: The unique identifier of virtualEventSession
        Returns: VirtualEventSessionItemRequestBuilder
        
msgraph/generated/solutions/virtual_events/webinars/item/registrations/item/sessions/sessions_request_builder.py