def samplesDir = new File("$workDir/$dir")
        if (samplesDir.exists()) {
            assertDeclaredAsInput(samplesDir.absolutePath)
            return samplesDir
        }
        throw new RuntimeException("$samplesDir does not exist")
    }

    static void assertDeclaredAsInput(String dir) {
        String inputs = System.getProperty("declaredSampleInputs")