RTCConvert to support this type xcode11 react native

vim node_modules/react-native/React/Base/RCTModuleMethod.mm

line 93

replace

   return RCTReadString(input, "__attribute__((unused))") ||
         RCTReadString(input, "__unused");

to

   return RCTReadString(input, "__attribute__((unused))") ||
         RCTReadString(input, "__attribute__((__unused__))") ||
         RCTReadString(input, "__unused");