bool mongoc_gridfs_file_save (mongoc_gridfs_file_t *file);
- file: A mongoc_gridfs_file_t.
Saves modifications to file to the MongoDB server.
If an error occurred, false is returned and the error can be retrieved with mongoc_gridfs_file_error().
Modifying GridFS files is NOT thread-safe. Only one thread or process can access a GridFS file while it is being modified.
Returns true if successful, otherwise false.
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