This would be very useful. But how are these extension methods more searchable by syntax than the 'old fashioned' static util methods? I admit I haven't tried, but I suspect that code completion in my IDE wouldn't include these extension methods.
Java specific: If you're looking for a static utility method, then `UtilClass.` will also autocomplete. However, what if the function you're looking for isn't in `UtilClass`, but `SomeOtherClass`? What if you don't even know whether a method already exists for what you're trying to accomplish, and it could possibly exist in multiple libraries? Your discoverability engine quickly becomes Google.