public static boolean isPackedFile(File file) throws IOException {
		InputStream inputStream = null;
		try {
			inputStream = new BufferedInputStream(new FileInputStream(file));
			return isPackedFile(inputStream);
		}
		finally {
			if (inputStream != null) {
				try {
					inputStream.close();
				}
				catch (IOException e) {
					// we tried
				}
			}
		}
	}
A simple utility method to determine if the given file is a packed file as created by 
this class. 
@param file The file to check
@return True if it is a packed file
@throws IOException If there is a problem reading the given file
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/ItemSerializer.java