text: import { coordEach } from '@turf/meta';
  import { isObject } from '@turf/helpers';
  import clone from '@turf/clone';
  
  /**
   * Takes input features and flips all of their coordinates from `[x, y]` to `[y, x]`.
   *
   * @name flip
   * @param {GeoJSON} geojson input features
   * @param {Object} [options={}] Optional parameters
   * @param {boolean} [options.mutate=false] allows GeoJSON input to be mutated (significant performance increase if true)
   * @returns {GeoJSON} a feature or set of features of the same type as `input` with flipped coordinates
   * @example
   * var serbia = turf.point([20.566406, 43.421008]);
   *
   * var saudiArabia = turf.flip(serbia);
   *
   * //addToMap
   * var addToMap = [serbia, saudiArabia];
   */
  function flip(geojson, options) {
      // Optional parameters
      options = options || {};
      if (!isObject(options)) throw new Error('options is invalid');
      var mutate = options.mutate;
  
      if (!geojson) throw new Error('geojson is required');
      // ensure that we don't modify features in-place and changes to the
      // output do not change the previous feature, including changes to nested
      // properties.
      if (mutate === false || mutate === undefined) geojson = clone(geojson);
  
      coordEach(geojson, function (coord) {
          var x = coord[0];
          var y = coord[1];
          coord[0] = y;
          coord[1] = x;
      });
      return geojson;
  }
  
  export default flip;
  