src/main/java/com/github/ricksbrown/cowsay/Cowsay.java
private static CowFace getCowFaceByMode(final CommandLine commandLine) {
		CowFace cowFace = null;
		Set<String> modes = CowFace.COW_MODES.keySet();
		for (String mode : modes) {
			if (commandLine.hasOption(mode)) {
				cowFace = CowFace.getByMode(mode);
				break;
			}
		}
		return cowFace;
	}
private static CowFace getCowFaceByMode(final CommandLine commandLine) {
		CowFace cowFace = null;
		Set<String> modes = CowFace.COW_MODES.keySet();
		for (String mode : modes) {
			if (commandLine.hasOption(mode)) {
				cowFace = CowFace.getByMode(mode);
				break;
			}
		}
		return cowFace;
	}
If a pre-defined cow mode has been set on the command line then use that face.
@param commandLine The command line with user options.
@return The cowface for the mode selected on the command line or null if no mode set.