Function getMappedTypeOptionality

test/fixtures/snapshot/typescript.js:58683–58686

(type)

                (declaration.questionToken ? declaration.questionToken.kind === 40 /* SyntaxKind.MinusToken */ ? 8 /* MappedTypeModifiers.ExcludeOptional */ : 4 /* MappedTypeModifiers.IncludeOptional */ : 0);
        }
        function getMappedTypeOptionality(type) {
            var modifiers = getMappedTypeModifiers(type);
            return modifiers & 8 /* MappedTypeModifiers.ExcludeOptional */ ? -1 : modifiers & 4 /* MappedTypeModifiers.IncludeOptional */ ? 1 : 0;
        }
        function getCombinedMappedTypeOptionality(type) {
            var optionality = getMappedTypeOptionality(type);
            var modifiersType = getModifiersTypeFromMappedType(type);