I want to use underscores in the selectors which define external functions, to match the external function name as much as possible. So I checked the preference "allowUnderscoreSelectors". I can define and use such selectors, however each time I browse a method whose selector has an underscore, I get the attached modal pop-up:

 

This seems to happen in both 4.4 and 4.5. 

Is there something else I am supposed to do to properly enable underscores in selectors?

Thanks,
Doug 
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