AddLimitsOnChangeCallback takes a callback function that will be called with the new and old values of limits whenever they change.

Apply receives a config and applies it.

GoMaxProcs reports the currently stored limit on the number of operating system threads per process in Go.

Parse receives a policy, parses and returns the limits section.

RemoveLimitsOnChangeCallback removes the callback function associated with the given ID (originally passed to `AddLimitsOnChangeCallback`).