.getStyle();
PreferenceManager manager = new PreferenceManager();
EditPartViewer viewer = this._editPart.getViewer();
Shell shell = viewer.getControl().getShell();
CSSPropertyContext context = new CSSPropertyContext(styleDeclaration);
StyleDialog dialog = new StyleDialog(shell, manager, _element, context);
if (dialog.open() == Window.OK) {
if (context.isModified()) {
ChangeStyleCommand c = new ChangeStyleCommand(_element, _attribute, context);
c.execute();
}
}
}