mongoc_gridfs_file_set_metadata()
Synopsis
void
mongoc_gridfs_file_set_metadata (mongoc_gridfs_file_t *file,
                                 const bson_t         *metadata);Parameters
| file | |
| bson | A bson_t containing metadata for file. | 
Description
Sets the metadata associated with file.
You need to call mongoc_gridfs_file_save() to persist this change.