async def get(self,request_configuration: Optional[RequestConfiguration[DeviceInstallStateItemRequestBuilderGetQueryParameters]] = None) -> Optional[DeviceInstallState]:
        """
        The install state of the eBook.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[DeviceInstallState]
        """
        request_info = self.to_get_request_information(
            request_configuration
        )
        from ........models.o_data_errors.o_data_error import ODataError

        error_mapping: dict[str, type[ParsableFactory]] = {
            "XXX": ODataError,
        }
        if not self.request_adapter:
            raise Exception("Http core is null") 
        from ........models.device_install_state import DeviceInstallState

        return await self.request_adapter.send_async(request_info, DeviceInstallState, error_mapping)

        The install state of the eBook.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[DeviceInstallState]
        
msgraph/generated/device_app_management/managed_e_books/item/user_state_summary/item/device_states/item/device_install_state_item_request_builder.py