docs: def _parse_qemu_img_info(info):
      '''
      Parse qemu-img info JSON output into disk infos dictionary
      '''
      raw_infos = salt.utils.json.loads(info)
      disks = []
      for disk_infos in raw_infos:
          disk = {
                     'file': disk_infos['filename'],
                     'file format': disk_infos['format'],
                     'disk size': disk_infos['actual-size'],
                     'virtual size': disk_infos['virtual-size'],
                     'cluster size': disk_infos['cluster-size'] if 'cluster-size' in disk_infos else None,
                 }
  
          if 'full-backing-filename' in disk_infos.keys():
              disk['backing file'] = format(disk_infos['full-backing-filename'])
  
          if 'snapshots' in disk_infos.keys():
              disk['snapshots'] = [
                      {
                          'id': snapshot['id'],
                          'tag': snapshot['name'],
                          'vmsize': snapshot['vm-state-size'],
                          'date': datetime.datetime.fromtimestamp(
                              float('{}.{}'.format(snapshot['date-sec'], snapshot['date-nsec']))).isoformat(),
                          'vmclock': datetime.datetime.utcfromtimestamp(
                              float('{}.{}'.format(snapshot['vm-clock-sec'],
                                                   snapshot['vm-clock-nsec']))).time().isoformat()
                      } for snapshot in disk_infos['snapshots']]
          disks.append(disk)
  
      for disk in disks:
          if 'backing file' in disk.keys():
              candidates = [info for info in disks if 'file' in info.keys() and info['file'] == disk['backing file']]
              if candidates:
                  disk['backing file'] = candidates[0]
  
      return disks[0]