Function getDiscriminantPropertyAccess

test/fixtures/snapshot/typescript.js:70787–70799

(expr, computedType)

                return undefined;
            }
            function getDiscriminantPropertyAccess(expr, computedType) {
                var type = declaredType.flags & 1048576 /* TypeFlags.Union */ ? declaredType : computedType;
                if (type.flags & 1048576 /* TypeFlags.Union */) {
                    var access = getCandidateDiscriminantPropertyAccess(expr);
                    if (access) {
                        var name = getAccessedPropertyName(access);
                        if (name && isDiscriminantProperty(type, name)) {
                            return access;
                        }
                    }
                }
                return undefined;
            }
            function narrowTypeByDiscriminant(type, access, narrowType) {
                var propName = getAccessedPropertyName(access);
                if (propName === undefined) {