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Preface
This guide describes the updates in Eclipse Vert.x 4 release. Use the information to upgrade your Eclipse Vert.x 3.x applications to Eclipse Vert.x 4. It provides information about the new, deprecated and unsupported features in this release.
Depending on the modules used in your application, you can read the relevant section to know more about the changes in Eclipse Vert.x 4.
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