Function isExactOptionalPropertyMismatch

test/fixtures/snapshot/typescript.js:66893–66895

(source, target)

                .filter(function (targetProp) { return isExactOptionalPropertyMismatch(getTypeOfPropertyOfType(source, targetProp.escapedName), getTypeOfSymbol(targetProp)); });
        }
        function isExactOptionalPropertyMismatch(source, target) {
            return !!source && !!target && maybeTypeOfKind(source, 32768 /* TypeFlags.Undefined */) && !!containsMissingType(target);
        }
        function getExactOptionalProperties(type) {
            return getPropertiesOfType(type).filter(function (targetProp) { return containsMissingType(getTypeOfSymbol(targetProp)); });
        }