Contains classes that extend from other parts of Eclipse such as SWT, JFace and the workbench interfaces. It is usefull to group them in this package because they are extensions that help realize the GEF infrastructure but they are not explicitly part of the main hierarchies with-in GEF.

The example with-in this package is the `TextCellEditorEx which was extended from the JFace implementation to allow for DirectEdit of name labels so that the first character typed is not lost.`

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