elharo opened a new pull request, #397:
URL: https://github.com/apache/maven-shared-utils/pull/397

   All public `write` methods accept an `Xpp3Dom dom` parameter without null 
checks. Passing `null` throws a `NullPointerException` deep inside the 
delegation chain (at `dom.getName()` in the `write(XMLWriter, Xpp3Dom, 
boolean)` method), producing a confusing stack trace for callers.
   
   **Fix:** Added `Objects.requireNonNull(dom, "dom must not be null")` at the 
entry to the shared `write(XMLWriter, Xpp3Dom, boolean)` method, so callers get 
a clear message immediately.
   
   Fixes https://github.com/apache/maven-shared-utils/issues/396


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