Suggestion

Expose escapeLeadingUnserscores as part of the public API. unescapeLeadingUnderscores is already exposed.

Use Cases

My use case is looking up properties on a ts.Type. To correctly handle well-known symbols (__@symbolName), I need to compare directly to Symbol#escapedName. To make this work with regular names, I need to escape them before comparing. Currently I use my own function for escaping the name, which is not the best solution IMO.