def blocking_delete(self, meta=None, index_fields=None):
self.delete(meta=meta, index_fields=index_fields)<EOL>while self.objects.filter(key=self.key).count():<EOL><INDENT>time.sleep(<NUM_LIT>)<EOL><DEDENT>
Deletes and waits till the backend properly update indexes for just deleted object.
meta (dict): JSON serializable meta data for logging of save operation.
    {'lorem': 'ipsum', 'dolar': 5}
index_fields (list): Tuple list for indexing keys in riak (with 'bin' or 'int').
    bin is used for string fields, int is used for integer fields.
    [('lorem','bin'),('dolar','int')]