OpenRA

How to program certain, fixed unit in Crate?
Do you know these little blue boxes in Dune2000? With different unexpected surprises: actions, units and so on.

For example — I want MCV in the crate.

Something like an answer.

I made new object "crate2".
It inerits something from "crate" but it switch off many properties.
So this is variant of solution.

But I suppose it can be made another way.

In original "crate" used another code for "mcv". And only for "mcv".
GiveBaseBuilderCrateAction

For other units:
GiveUnitCrateAction

Original code for "mcv". It does not work in my "crate2". I tried.
I don't know why. Maybe somebody knows?

And it works with this.
GiveUnitCrateAction
As in code in the message above.

Another question.

How to switch off properties when I make inheritance?

For example. We have 3 "cash givings" in the Crate object:

GiveCashCrateAction@1
GiveCashCrateAction@2
GiveCashCrateAction@3

The code, for details
(it is not very important now). Actually, I can switch off them (in new object) by dint of "-".

-GiveCashCrateAction@1:
-GiveCashCrateAction@2:
-GiveCashCrateAction@3:

My aim.
I would like to switch off all them. At one line.

But if write
-GiveCashCrateAction:
it gives error
Exception of type `System.ArgumentException`: Collection must not be empty.

The same error with
-GiveCashCrateAction@1-3:

---------------------------------

So why do I need it, in general?

Of course, it is not difficult to write three lines.
But! This is not so easy, for example, for
GiveUnitCrateAction.

It is more than twenty properties!

GiveUnitCrateAction@LightInfantry:
GiveUnitCrateAction@Trooper:
GiveUnitCrateAction@Engineer:
GiveUnitCrateAction@Thumper:
GiveUnitCrateAction@Grenadier:

and many other.