ollect_manual()`` step
        of the collection phase.

        Plugins should call this method using a ``with`` context manager.

        :param fname:       The name of the file within the plugin directory
        :type fname:        ``str``

        :param subdir:      If needed, specify a subdir to write the file to
        :type subdir:       ``str``

        :param tags:        Tags to be added to this file in the manifest
        :type tags:         ``str`` or ``list`` of ``str``
        )