Swift3: Value of type "Character" has no member 'uppercased' -


value of type "character" has no member 'uppercased': please, me. how fix problem?

func type(_ string: string) {         char_ in string.characters {             if (char_.uppercased() == char_ && currectcase() == "lowercase")                 || (char_.lowercased() == char_ && currectcase() == "uppercase") {                 tapshift()             }             typecharacter(char_)         }         updateaccessibilityhierarchy()     }


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