Nativescript angular code sharing. tns-core-modules not found

Question

After have googled a bit and found myself with the same error I know what is the issue. Nevertheless, in this case I don´y know how to find the "bad-code".

I am developing a shared web/mobile nativescript-angular app. So far so good. I had sometimes the problem that I imported in the web part some native code and then by doing ng serve I have the error:

can't resolve '~/package.json' in tns-core-modules/profiling' and --- 40 lines more 

In these cases I check the imports change them accordingly and it worked. my problem now is that I made almost 100 changes and now I don't know where I imported wrongly some native code, I am almost sure that don´t.....

Then my question is by `ng serve' how can I get in which component/module/service do I have the native code that makes my bundles crash??

Does have anyone an idea? Thanks in advance good ideas will prevent me from building again the whole app component after component!!!