return samplesDir
        }
        throw new RuntimeException("$samplesDir does not exist")
    }

    static void assertDeclaredAsInput(String dir) {
        String inputs = System.getProperty("declaredSampleInputs")
        assert inputs: "Must declare source directory as input: 'integTest.usesJavadocCodeSnippets.set(true)'"
        assert inputs == dir
    }

    static void runSamplesFromFile(File file, Closure runner) {