Bug 296456 [Import/Export] File -> Import filesystem w/cyclical symbolic folder links causes OOME
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceImportPage1.java
super.handleTypesEditButtonPressed();
    }
    /**
     *  Import the resources with extensions as specified by the user
     */
    protected boolean importResources(List fileSystemObjects) {
        ImportOperation operation = new ImportOperation(getContainerFullPath(),
                getSourceDirectory(), FileSystemStructureProvider.INSTANCE,
                this, fileSystemObjects);
        operation.setContext(getShell());
        return executeImportOperation(operation);
    }
    /**
     * Initializes the specified operation appropriately.
     */
    protected void initializeOperation(ImportOperation op) {
        op.setCreateContainerStructure(createContainerStructureButton
                .getSelection());
        op.setOverwriteResources(overwriteExistingResourcesCheckbox
                .getSelection());
    }
    /**
     * Returns whether the extension provided is an extension that
     * has been specified for export by the user.
     *
     * @param extension the resource name
     * @return <code>true</code> if the resource name is suitable for export based 
     *   upon its extension
     */
    protected boolean isExportableExtension(String extension) {