*/
  public static void checkArgument(boolean expression, @Nullable Object errorMessage) {
    if (!expression) {
      throw new IllegalArgumentException(Platform.stringValueOf(errorMessage));
    }
  }

  /**
   * Ensures the truth of an expression involving one or more parameters to the calling method.
   *
   * @param expression a boolean expression

   */
  public static void checkArgument(boolean expression, @Nullable Object errorMessage) {
    if (!expression) {
      throw new IllegalArgumentException(Platform.stringValueOf(errorMessage));
    }
  }

  /**
   * Ensures the truth of an expression involving one or more parameters to the calling method.
   *
   * @param expression a boolean expression