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:man_page: mongoc_read_concern_append
mongoc_read_concern_append()
============================
Synopsis
--------
.. code-block:: c
bool
mongoc_read_concern_append (mongoc_read_concern_t *read_concern, bson_t *opts);
Parameters
----------
* ``read_concern``: A pointer to a :symbol:`mongoc_read_concern_t`.
* ``command``: A pointer to a :symbol:`bson:bson_t`.
Description
-----------
This function appends a read concern to command options. It is useful for appending a read concern to command options before passing them to :symbol:`mongoc_client_read_command_with_opts` or a related function that takes an options document.
Returns
-------
Returns true on success. If any arguments are invalid, returns false and logs an error.
Example
-------
See the example code for :symbol:`mongoc_client_read_command_with_opts`.
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