def by_mobile_app_content_file_id(self,mobile_app_content_file_id: str) -> MobileAppContentFileItemRequestBuilder:
        """
        Provides operations to manage the files property of the microsoft.graph.mobileAppContent entity.
        param mobile_app_content_file_id: The unique identifier of mobileAppContentFile
        Returns: MobileAppContentFileItemRequestBuilder
        """
        if mobile_app_content_file_id is None:
            raise TypeError("mobile_app_content_file_id cannot be null.")
        from .item.mobile_app_content_file_item_request_builder import MobileAppContentFileItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["mobileAppContentFile%2Did"] = mobile_app_content_file_id
        return MobileAppContentFileItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the files property of the microsoft.graph.mobileAppContent entity.
        param mobile_app_content_file_id: The unique identifier of mobileAppContentFile
        Returns: MobileAppContentFileItemRequestBuilder
        
msgraph/generated/device_app_management/mobile_apps/item/graph_windows_app_x/content_versions/item/files/files_request_builder.py