code: function getMode(type) {
    let mode;
    if (type === GeometryType.POINT ||
        type === GeometryType.MULTI_POINT) {
      mode = Mode.POINT;
    } else if (type === GeometryType.LINE_STRING ||
        type === GeometryType.MULTI_LINE_STRING) {
      mode = Mode.LINE_STRING;
    } else if (type === GeometryType.POLYGON ||
        type === GeometryType.MULTI_POLYGON) {
      mode = Mode.POLYGON;
    } else if (type === GeometryType.CIRCLE) {
      mode = Mode.CIRCLE;
    }
    return (
      /** @type {!Mode} */ (mode)
    );
  }
docs: Get the drawing mode.  The mode for mult-part geometries is the same as for
  their single-part cousins.
  @param {GeometryType} type Geometry type.
  @return {Mode} Drawing mode.