Netbeans module development: How to get a list of all namespaces in the current project? -

I am developing a Netbeen module for PHP code special code completion features. I am very familiar with Java development.

My question is: Which Netbeans API provides information about existing loaded projects (namespaces, classes ...), and how can I use this API?

For example: I want to show a list (to complete the code) with all the sections of a different namespace, even if the files are in different folders.

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