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<title>Adopting JDT 4.21 mechanisms and APIs</title>
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<h1>Adopting JDT 4.21 mechanisms and APIs</h1>
<p>
  This section describes changes that are required if you are trying to change
  your 4.20 plug-in to adopt the 4.21 mechanisms and APIs.
</p>

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	<li>None</li>
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