docs: function checkFeature(point) {
    var feature;
    // Check if there is already a feature object for the given point
    for (var i = 0; i < feature_list.length; i++) {
      feature = feature_list[i];
      if (feature.location.latitude === point.latitude &&
          feature.location.longitude === point.longitude) {
        return feature;
      }
    }
    var name = '';
    feature = {
      name: name,
      location: point
    };
    return feature;
  }