pub(crate) fn extract_throttle_config(
config: &mut HashMap<FragmentId, (ThrottleConfig, PbStreamNode)>,
apply: impl FnMut(FragmentId, &PbStreamNode) -> bool,
) -> Option<Mutation>pub(crate) fn extract_throttle_config(
config: &mut HashMap<FragmentId, (ThrottleConfig, PbStreamNode)>,
apply: impl FnMut(FragmentId, &PbStreamNode) -> bool,
) -> Option<Mutation>