def registrations_with_email(self,email: str) -> RegistrationsWithEmailRequestBuilder:
        """
        Provides operations to manage the registrations property of the microsoft.graph.virtualEventWebinar entity.
        param email: Alternate key of virtualEventRegistration
        Returns: RegistrationsWithEmailRequestBuilder
        """
        if email is None:
            raise TypeError("email cannot be null.")
        from .registrations_with_email.registrations_with_email_request_builder import RegistrationsWithEmailRequestBuilder

        return RegistrationsWithEmailRequestBuilder(self.request_adapter, self.path_parameters, email)

        Provides operations to manage the registrations property of the microsoft.graph.virtualEventWebinar entity.
        param email: Alternate key of virtualEventRegistration
        Returns: RegistrationsWithEmailRequestBuilder
        
msgraph/generated/solutions/virtual_events/webinars/item/virtual_event_webinar_item_request_builder.py