Is there some guide for editing SDK classes within Flash Builder? I have installed Flex 4.9 and have also downloaded the source. I tried just removing the mx.swc and framework.swc from the Build Path Libraries and then adding the respective src folders. That seems to get me closer, but now I have lots of errors because I don't have the config variable:
CONFIG::performanceInstrumentation defined. I'm trying to investigate a possible bug in the SDK while running a small test project. I'd like to make changes to some SDK classes and see if that resolves my problem. I couldn't find any guides on the main Flex page or on the Apache Flex wiki on getting this set up.
