code: function createLayers(sources) {
    const len = sources.length;
    const layers = new Array(len);
    for (let i = 0; i < len; ++i) {
      layers[i] = createLayer(sources[i]);
    }
    return layers;
  }
docs: Create layers for all sources.
  @param {Array<import("./Source.js").default|import("../layer/Layer.js").default>} sources The sources.
  @return {Array<import("../layer/Layer.js").default>} Array of layers.