import PRC from '@3rdpartyVendor/3rdpartyModule'

TS7016: Could not find a declaration file for module '@3rdpartyVendor/3rdpartyModule'. '~/myprojdir/node_modules/@3rdpartyVendor/3rdpartyModule/lib/index.js' implicitly has an 'any' type.

....
   "include": [
     "src/**/*"
   ],
   ....

./src/@types/3rdpartyVendor__3rdpartyModule/index.d.ts

declare module '@3rdpartyVendor/3rdpartyModule';