@Nullable
	public static String getExtension(String path) {
		int dotIndex = path.lastIndexOf('.');
		if (dotIndex < path.length() - 1) {
			return path.substring(dotIndex + 1);
		} else {
			return null;
		}
	}
Get the extension from a path.

@param path
		Path to get extension from.

@return Name of extension of the path if present, {@code null} otherwise.
recaf-core/src/main/java/software/coley/recaf/util/IOUtil.java