Angular2 Tutorial (Tour of Heroes): Cannot find module 'angular2-in-memory-web-api'

Question

I have followed the Tutorial. After changing app/maint.ts in the Http chapter I get the error when starting the app via command line:

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Answer 1

I solved it copying index.js and index.d.ts to core.js and core.d.ts, that is, inside node_modules/angular2-in-memory-web-api folder. Go figure out.