def by_mobile_app_id(self,mobile_app_id: str) -> MobileAppItemRequestBuilder:
        """
        Provides operations to manage the mobileApps property of the microsoft.graph.deviceAppManagement entity.
        param mobile_app_id: The unique identifier of mobileApp
        Returns: MobileAppItemRequestBuilder
        """
        if mobile_app_id is None:
            raise TypeError("mobile_app_id cannot be null.")
        from .item.mobile_app_item_request_builder import MobileAppItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["mobileApp%2Did"] = mobile_app_id
        return MobileAppItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the mobileApps property of the microsoft.graph.deviceAppManagement entity.
        param mobile_app_id: The unique identifier of mobileApp
        Returns: MobileAppItemRequestBuilder
        
msgraph/generated/device_app_management/mobile_apps/mobile_apps_request_builder.py