For some reason I can't figure out, when TS tries to import types from this library, it has no end of trouble with the reference to @maxim_mazurok/gapi.client.drive and @maxim_mazurok/gapi.client.sheets. It is a dependency of @types/gapi.client.drive and @types/gapi.client.sheets, but somehow it isn't getting figured out properly.
To make matters worse, the tests all pass until you try to import this library in a different TS project, at which point it tells you that it cannot resolve that. The solution was to just explicity add those two libraries as dependencies, and specificy EXACTLY the same version as the one being used in @types/gapi.client.drive and @types/gapi.client.sheets.
I don't expect this to be a long-term solution because the next time you install @types/gapi.client.drive, it will likely pull a different version of @maxim_mazurok's library and you'll have to match it there again.