Recipe.fromMap

// ...
  Recipe.fromMap(Map<String, dynamic> data, String id)
      : this(
          id: id,
          type: RecipeType.values[data['type']],
          name: data['name'],
          duration: Duration(minutes: data['duration']),
          ingredients: new List<String>.from(data['ingredients']),
          preparation: new List<String>.from(data['preparation']),
          imageURL: data['image'],
        );
// ...