Actually, ```env.supports("random-string-not-in-the-file")``` would throw a NoSuchElementException as per https://github.com/caelum/vraptor4/blob/master/vraptor-core/src/test/java/br/com/caelum/vraptor/environment/DefaultEnvironmentTest.java#L50 imply

thats why i didnt put a null check.