private String appendExporterFileExtension(String filename) {
		Exporter exporter = getSelectedExporter();
		String extension = exporter.getDefaultFileExtension();
		if (extension.isEmpty()) {
			return filename;
		}
		extension = "." + extension;
		if (!filename.toLowerCase().endsWith(extension.toLowerCase())) {
			return filename + extension;
		}
		return filename;
	}
This list generation will be based upon the open domainObject if available, otherwise
the domainFile's content class will be used.
@return list of exporters able to handle content
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/exporter/ExporterDialog.java