private File getClassesDirectory() throws FileNotFoundException {
		File file = getTestDataTypeFile();
		if (file == null) {
			throw new FileNotFoundException("Could not find resource TestDataType.txt");
		}
		File parent = file.getParentFile();
		String parentPath = parent.getAbsolutePath();
		int pos = parentPath.lastIndexOf("ghidra");
		String destPath = parentPath.substring(0, pos - 1);
		String newpath =
			destPath + File.separator + "ghidra" + File.separator + "app" + File.separator + "test";
		return new File(newpath);
	}
This directory is bin in eclipse; it will be a resources directory in the classpath when run
in batch mode.   The directory is one specifically created by and for this test.
@return class output directory
@throws FileNotFoundException Could not find class output directory
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/datamgr/DataTypeManagerPluginTest.java