825   struct ScalarTraits<MyCustomType> {  struct
826     static void output(const MyCustomType &value, void* ctxt, llvm::raw_ostream &out) {  in output()
829     static StringRef input(StringRef scalar, void* ctxt, MyCustomType &value) {  in input()
848     static bool mustQuote(StringRef) { return true; }  in mustQuote()
1038   struct ScalarTraits<MyNumber> {  struct
1039     static void output(const MyNumber &value, void *, llvm::raw_ostream &out) {  in output()
1043     static StringRef input(StringRef scalar, void *, MyNumber &value) {  in input()
1051     static bool mustQuote(StringRef) { return false; }  in mustQuote()
2209 struct ScalarTraits<FlowSeq> {  struct
2210   static void output(const FlowSeq &value, void*, llvm::raw_ostream &out) {  in output()
2213   static StringRef input(StringRef scalar, void*, FlowSeq &value) {  in input()
2218   static bool mustQuote(StringRef S) { return false; }  in mustQuote()