docs: def copy_snapshot(kwargs=None, call=None):
      '''
      Copy a snapshot
      '''
      if call != 'function':
          log.error(
              'The copy_snapshot function must be called with -f or --function.'
          )
          return False
  
      if 'source_region' not in kwargs:
          log.error('A source_region must be specified to copy a snapshot.')
          return False
  
      if 'source_snapshot_id' not in kwargs:
          log.error('A source_snapshot_id must be specified to copy a snapshot.')
          return False
  
      if 'description' not in kwargs:
          kwargs['description'] = ''
  
      params = {'Action': 'CopySnapshot'}
  
      if 'source_region' in kwargs:
          params['SourceRegion'] = kwargs['source_region']
  
      if 'source_snapshot_id' in kwargs:
          params['SourceSnapshotId'] = kwargs['source_snapshot_id']
  
      if 'description' in kwargs:
          params['Description'] = kwargs['description']
  
      log.debug(params)
  
      data = aws.query(params,
                       return_url=True,
                       location=get_location(),
                       provider=get_provider(),
                       opts=__opts__,
                       sigver='4')
      return data