*/
private void installProjectionSupport() {
projectionSupportInstalled = true;
ProjectionViewer projectionViewer = (ProjectionViewer) getSourceViewer();
fProjectionModelUpdater = new PHPFoldingStructureProviderProxy();
if (fProjectionModelUpdater != null)
fProjectionModelUpdater.install(projectionViewer);
if (isFoldingEnabled()) {
fProjectionModelUpdater.projectionEnabled();