toJson method
Converts an InputVenueMessageContent object to a JSON map
Implementation
@override
Map<String, dynamic> toJson() {
return {
'latitude': latitude,
'longitude': longitude,
'title': title,
'address': address,
'foursquare_id': foursquareId,
'foursquare_type': foursquareType,
'google_place_id': googlePlaceId,
'google_place_type': googlePlaceType,
}..removeWhere(_nullFilter);
}