Bug 320285 Messages inteneded for developers in the error log
The message "unsupported: isEditorAreaVisible" appears in the error log during the normal run of e4 SDK. (For instance, starting the e4 SDK on an clean workspace produces two of those messages.)
bundles/org.eclipse.e4.ui.workbench.addons.swt/src/org/eclipse/e4/ui/workbench/addons/perspectiveswitcher/PerspectiveSwitcher.java
return persp;
				}
			}
		}
		return null;
	}
	
	
	private void openPerspective(PerspectiveDescriptor desc) {
		IWorkbenchWindow workbenchWindow = window.getContext().get(IWorkbenchWindow.class);
		IWorkbenchPage page = workbenchWindow.getActivePage();
		if (page == null) {
			try {
				
				workbenchWindow.openPage(desc.getId(),
						((Workbench) workbenchWindow.getWorkbench()).getDefaultPageInput());
			} catch (WorkbenchException e) {
				IStatus errorStatus = new Status(
						IStatus.ERROR,
						WorkbenchPlugin.PI_WORKBENCH,
						NLS.bind(WorkbenchMessages.Workbench_showPerspectiveError, desc.getLabel()),
						e);
				StatusManager.getManager().handle(errorStatus, StatusManager.SHOW);
			}
		} else {
			page.setPerspective(desc);
		}
	}
	private void selectPerspective() {
		SelectPerspectiveDialog dialog = new SelectPerspectiveDialog(psTB.getShell(), PlatformUI