private DomainFolder getOdexApkOrJarFolder() {
		String baseName = FilenameUtils.removeExtension(oatProgram.getName());
		DomainFile domainFile = oatProgram.getDomainFile();
		DomainFolder parentFolder = domainFile.getParent();
		parentFolder = parentFolder.getFolder(baseName + ODEX);//APP_DIR.odex/
		if (parentFolder != null) {
			if (parentFolder.getFolder(baseName + APK) != null) {
				return parentFolder.getFolder(baseName + APK);//APP_DIR/APP.apk/
			}
			else if (parentFolder.getFolder(baseName + JAR) != null) {
				return parentFolder.getFolder(baseName + JAR);//APP_DIR/APP.jar/
			}
		}
		return null;
	}
ODEX files can contain APKs or JARs.
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/android/oat/bundle/FullOatBundle.java