Recently I faced the situation where I needed the information of a second table in my collection and the first thought that crossed my mind was let's rewrite the collection to add my on stuff but... is that really the right approach?

First, by rewriting the core collection class I am going to af...

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To be able to output warnings, error and notice messages in our modules we have to use the following interface \Magento\Framework\Message\ManagerInterface.

The best way to use it is through Dependency Injection in the constructor as follows:

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