@param c The connection
@param mode A bitmask of #xcb_set_mode_t values.
@param mode Insert to add the specified window to the save set or Delete to delete it from the save set.
@param window The window to add or delete to/from your save set.
@return A cookie
TODO: explain what the save set is for.
This function either adds or removes the specified window to the client's (your
application's) save set.
This form can be used only if the request will not cause
a reply to be generated. Any returned error will be
saved for handling by xcb_request_check().
@brief Changes a client's save set
@param c The connection @param mode A bitmask of #xcb_set_mode_t values. @param mode Insert to add the specified window to the save set or Delete to delete it from the save set. @param window The window to add or delete to/from your save set. @return A cookie
TODO: explain what the save set is for.
This function either adds or removes the specified window to the client's (your application's) save set.
This form can be used only if the request will not cause a reply to be generated. Any returned error will be saved for handling by xcb_request_check().