crequire | Get dependences of using require | Parser library

Consider a space ship factory that makes space ships. when it produces a ship, it updates the current resources on the planet that it lives and also update the state of the spaceship storage. Hence, the space ship factory is a publisher for two observers. Namely, the resources on the planet and the space ship storage. . When using the observer design pattern, observers have to implement the update method that can be called by the publisher whenever the publisher wants to publish. The publisher stores a list of its observers in an Arraylist and call update by iterating through each observers like the following: