Make GWT nature addition optional for Projects that refer to GWT maven plug-ins in their pom

Some of my GWT projects consist entirely of generated artefacts (from models etc.).
To build them out I package them as gwt-lib (Thomas Broyer's Maven GWT plug-in).

I see that the MavenProjectConfigurator always adds the GWT nature to such projects.

For my projects that have only generated resources in, I do not want the GWT nature to be added as it results in extra builders, validation, etc. that aren't necessary (as I already know that the artefacts are valid).

For some projects (hand maintained code) I do want the natures. Could you please add a project by project flag so I can avoid the nature addition in some cases?

I ask because we have a very large number of projects, and the addition of GWT natures seems to lead to a lot of extra builder invocation that in some cases we could avoid in order to boost the performance of our IDE.

issueで言及されている MavenProjectConfigurator から始め、GWT Maven plug-insを使用するプロジェクトでGWT natureが追加される箇所を追跡します。プロジェクト単位のオプションを定義し、それが選択されている場合にのみ追加のnature、builders、validationを抑制し、それ以外では現在の動作を維持することを確認します。

索引モデルが issue の本文から書いたものです。