[quote="dirk-thomas, post:5, topic:6497"]
The existing parameters implementation enables each note to review incoming parameter change request and either accept or reject them base on an arbitrary policy.
[/quote]
See [here for the method](
https://github.com/ros2/rclcpp/blob/master/rclcpp/include/rclcpp/node.hpp#L362) and [here for a sample](
https://github.com/ros2/demos/blob/master/demo_nodes_cpp/src/parameters/even_parameters_node.cpp) (I think).
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