From @andy-ms's feedback: https://github.com/Microsoft/TypeScript/pull/18300/files#r141959156 Let's make sure these helper names are contained in a singe place.
From @Andy-MS's feedback: https://github.com/Microsoft/TypeScript/pull/18300/files#r141959156
Let's make sure these helper names are contained in a singe place.