Garry Dolley has developed a Ruby module called "Immutable" (Github repository ).
It allows you to make your methods immutable. As Gary says, "provide it a list of methods you don’t want touched and it’ll make sure they can’t be redefined." Effectively, it's a smack-down against monkeypatching.
Gary developed immutable to ensure that ActiveSupport wouldn't interfere with his attempts to improve Rails' loading time by reimplementing some ActiveSupport methods in C (by redefining his own changes)....
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