Dear Authentic, 'your_path_to/typescripts/pro' tells, that you should place there path from file which imports ToastService to directory where /typescripts/pro folder is. So if you're importing ToastService in app.component.ts, and you're having typescripts directory in your src directory, the import path should looks like below:

import { ToastService } from './../typescripts/pro'

Best Regards, Damian

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