'Import an image from local storage into this backend.
Import a local file into the store used by this image type. Note that
this is a noop for stores using local disk (the local file is
considered "in the store").
If the image already exists it will be overridden by the new file
:param local_file: path to the file to import
:param remote_name: the name for the file in the store'

def import_file(self, instance, local_file, remote_name):

    pass
