Bug 202639 [Import/Export] [Import/Export] Improve warning messages in WizardFileSystemResourceExportPage1
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceExportPage1.java
*/
    protected boolean validateDestinationGroup() {
        String destinationValue = getDestinationValue();
        if (destinationValue.length() == 0) {
            setMessage(destinationEmptyMessage());
            return false;
        }
        String conflictingContainer = getConflictingContainerNameFor(destinationValue);
        if (conflictingContainer == null) {
			
			String threatenedContainer = getOverlappingProjectName(destinationValue);
			if(threatenedContainer == null)
				setMessage(null);
			else
				setMessage(
					NLS.bind(DataTransferMessages.FileExport_conflictingContainer, threatenedContainer),
					WARNING);
			
		} else {
            setErrorMessage(NLS.bind(DataTransferMessages.FileExport_conflictingContainer, conflictingContainer));
            giveFocusToDestination();
            return false;
        }
        return true;
    }
    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.dialogs.WizardDataTransferPage#validateSourceGroup()
     */
    protected boolean validateSourceGroup() {