en/builder/src/zrender3/graphic/Gradient.js

/**
 * @param {Array.<Object>} colorStops
 */
var Gradient = function (colorStops) {
  this.colorStops = colorStops || [];
};

Gradient.prototype = {
  constructor: Gradient,
  addColorStop: function (offset, color) {
    this.colorStops.push({
      offset: offset,
      color: color
    });
  }
};
export default Gradient;