private File getTestDataTypeFile() {
		URL url = getClass().getResource("TestDataType.txt");
		try {
			URI uri = new URI(url.toExternalForm());
			return new File(uri);
		}
		catch (URISyntaxException e) {
			throw new RuntimeException("Cannot find TestDataType.txt");
		}

	}
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