Finding Cairo to be reasonably well-documented with examples, and already installed,
I did 'using Cairo' and then typed in "set_source_rgb(0, 0, 0)" -- with the result: "error -- no method for int64". "help" tells me that yes, "set_source_rgb") is a function, and has two methods. Neither of these methods like a float64 diet either. How do I find out what flavor arguments a package's methods want? --including how many, for what purpose -- and if something doesn't like "0" as an int64, how to tell it that "0" is really an int32, if it likes...?
