Function optionalChainContainsReference

test/fixtures/snapshot/typescript.js:69406–69414

(source, target)

            return false;
        }
        function optionalChainContainsReference(source, target) {
            while (ts.isOptionalChain(source)) {
                source = source.expression;
                if (isMatchingReference(source, target)) {
                    return true;
                }
            }
            return false;
        }
        function isDiscriminantProperty(type, name) {
            if (type && type.flags & 1048576 /* TypeFlags.Union */) {
                var prop = getUnionOrIntersectionProperty(type, name);