[discussion] synchronization of code copied from Maven core

We can find classes like:
https://github.com/apache/maven-mvnd/blob/master/daemon/src/main/java/org/mvndaemon/mvnd/plugin/CliMavenPluginManager.java

Where we have comments:

> This file is based on maven DefaultMavenPluginManager and changed in order
> to better support parallel builds. See https://github.com/mvndaemon/mvnd/issues/310

But the based on class can change ... like in: https://github.com/apache/maven/pull/285

Should it be synchronized, tracked in some ways?

Start with daemon/src/main/java/org/mvndaemon/mvnd/plugin/CliMavenPluginManager.java and compare it with Maven's DefaultMavenPluginManager, including the referenced Maven pull request. Determine how changes in the upstream class should be tracked or synchronized while preserving mvnd's parallel-build changes; done means documenting or implementing an agreed maintenance approach.

Written by the indexing model from the issue text.