�� Log Message:
�� -----------
10025 MethodDictionary at:put: and #flushCache
�� https://pharo.fogbugz.com/f/cases/10025

For this one we need to carefully check if there are bad side effects.

it should work as now at:put: is the fall-back case and flushes by selector.

(instead of clients having to do it explicitly)

�� Marcus