Hospital.fromJson constructor
Creates a Hospital instance from a JSON map.
Handles potential null values by providing default values (e.g., 0 for id, empty string for name) or keeping them null if not present.
Implementation
factory Hospital.fromJson(Map<String, dynamic> json) {
return Hospital(
id: json['id'] ?? 0,
name: json['name'] ?? '',
geolocationPoint: json['geolocation_point'],
radius: json['radius'],
address: json['address'],
);
}