public static boolean isTrue(boolean expression, String message) { if (!expression) throw new AssertionFailedException("assertion failed: " + message); return expression;
public static boolean isTrue(boolean expression) { return isTrue(expression, "");
	public static boolean isTrue(boolean expression, String message) {		if (!expression)			throw new AssertionFailedException("assertion failed: " + message); //$NON-NLS-1$		return expression;	}