return that().fail(message, args);
  }


  /**
   * Shortcut to
   * <code>Ensure.that().is(varName,var,condition,message,args)</code>
   * 
   * @see Check#thatVar(String, Object, boolean, String, Object...)
   */
  public static void thatVar(String varName, Object var, boolean condition, String message, Object... messageArgs) {
    that().thatVar(varName, var, condition, message, messageArgs);
  }

  /**
   * Shortcut to <code>Ensure.that().is(condition,message,args)</code>
   * 
   * @see Check#that(boolean, String, Object...)
   */
  public static void that(boolean condition, String message, Object... messageArgs) {
    that().that(condition, message, messageArgs);
  }

  /**
   * Shortcut to <code>Ensure.that().isNotNull(variableName, variable)</code>
   * 
   * @see Check#isNotNull(String, Object)
   */
  public static void isNotNull(String variableName, Object variable) {
    that().isNotNull(variableName, variable);
  }

  /**
   * Shortcut to <code>Ensure.that().isNull(variableName, variable)</code>
   * 
   * @see Check#isNull(String, Object)
   */
  public static void isNull(String variableName, Object variable) {
    that().isNull(variableName, variable);
  }

  /**
   * @return a singleton {@link Check} that throws
   *         {@link IllegalArgumentException}s on check failure
   */
  public static Check<IllegalArgumentException> that() {