'Gets the file unique bytes.'

def get_file_usage(self, path):

    LOG.debug('Getting    file    usage    for    %s', path)
    file_use = netapp_api.NaElement.create_node_with_children('file-usage-get', **{'path': path})
    res = self.connection.invoke_successfully(file_use)
    bytes = res.get_child_content('unique-bytes')
    LOG.debug('file-usage    for    path    %(path)s    is    %(bytes)s', {'path': path, 'bytes': bytes})
    return bytes
