jodd-core/src/main/java/jodd/io/FileUtil.java
private static void checkReferenceExists(final File file) throws IllegalArgumentException {
		try {
			checkExists(file);
		} catch (FileNotFoundException e) {
			throw new IllegalArgumentException("Reference file not found: " + file);
		}
	}
private static void checkReferenceExists(final File file) throws IllegalArgumentException {
		try {
			checkExists(file);
		} catch (FileNotFoundException e) {
			throw new IllegalArgumentException("Reference file not found: " + file);
		}
	}
Checks if {@link File} exists. Throws IllegalArgumentException if not.

@param file {@link File}
@throws IllegalArgumentException if file does not exist.