constructor(character, underline, italics, backgroundColor, textColor) {
    /**
     * @private {string}
     */
    this.character_ = character;

    /**
     * @private {boolean}
     */
    this.underline_ = underline;

    /**
     * @private {boolean}
     */
    this.italics_ = italics;

    /**
     * @private {string}
     */
    this.backgroundColor_ = backgroundColor;

    /**
     * @private {string}
     */
    this.textColor_ = textColor;
  }
@param {string} character
@param {boolean} underline
@param {boolean} italics
@param {string} backgroundColor
@param {string} textColor