Hi, there.

I just got really confused by the differences of

[SystemNavigation allCallsOn: #drawOn:] bench.

and

[SystemNavigation default allCallsOn: #drawOn:] bench.

because I expected that MNU fallback to kick in to insert "default" automatically.

However, #allCallsOn: is actually implemented in Behavior and not just in SystemNavigation.

Can we remove SystemNavigation class >> #doesNotUnderstand: so nobody starts relying on that?

Best,
Marcel
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