reset(a, b, style, life, easing) {
    this.same = b === null || b === undefined;

    this.a = Span.setSpanValue(Util.initValue(a, "Velocity"));
    this.b = Span.setSpanValue(Util.initValue(b, 0));
    this.style = Util.initValue(style, "to");

    life && super.reset(life, easing);
  }
Resets this behaviour's parameters.
@param {string|number|Span} [a='Velocity'] - The rotation's influence or initial rotation.
@param {string|number|Span} [b] - The final rotation value or range.
@param {string} [style='to'] - The style of rotation ('to' or 'add').
@param {number} [life] - This behaviour's life.
@param {string} [easing] - This behaviour's easing function.