constructor(fromValue, toValue, backgroundColor) {
    /**
     * The range start (minimal) value.
     * @type {number}
     */
    this.fromValue = fromValue;

    /**
     * The range end (maximal) value.
     * @type {number}
     */
    this.toValue = toValue;

    /**
     * Color to fill the range background with.
     * @type {string}
     */
    this.backgroundColor = backgroundColor;
  }
@param {number} fromValue The range start (minimal) value.
@param {number} toValue The range end (maximal) value.
@param {string} backgroundColor Color to fill the range background with.