Get and Change

food.ts

class FoodItem {
  constructor(private opts: FoodProperties) {}

  public get<T extends keyof FoodProperties>(property: T): FoodProperties[T] {
    return this.opts[property];
  }

  public change<T extends keyof FoodProperties>(
    property: T,
    value: FoodProperties[T]
  ) {
    this.opts[property] = value;
  }
}