You review a design written by somebody else for an application and you find these: - an interface Shape with a method draw () - a class Circle that implements Shape - a class Rectangle that implements Shape - a class CompoundShape that: o implements interface Shape o aggregates 0 or more Shape objects, o has an extra method called add (Shape sh) o for implementing method draw () calls the draw () method for all aggregated Shape objects. You assume that a CompoundShape object is made of multiple shapes. What design pattern is at work in this application? Explain your answer.
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