robotlegs/robotlegs-framework — comment on commit 7762f9e12906f03ccf02f2ec6dfa8cca3214a7ce
File: src/robotlegs/bender/extensions/mediatorMap/impl/DefaultMediatorManager.as line 100
By Stray:

Flex is only a subset of the flash platform. What about Flash IDE compiled and pure-AS3 apps?