Change contributions at different dates

[JackMorrissey]

(From an email)

One of the things in my financial plan is to divert debt payments to savings once things are paid off. Have you considered any way to add a facility to change retirement contributions in the future in the analysis?

Perhaps it could take the a form like:

BR4 + XXX BR4 2022-05 + YYY

Where XXX is the current contribution, and YYY is what to change it to starting in May 2022.

This notation could also work with expenses ("BR4 2032-01 FI ZZZ") for things you expect to change (e.g. moving from private insurance to medicare, reducing travel when you hit 75, etc.)