Refactoring for Encapsulation/Information Hiding

Main refactorings:

• Move Field
• Move Method
• Hide Method
• Encapsulate Downcast
• Encapsulate Field
• Encapsulate Collection
• Hide Delegate
• Self-Encapsulate Field

Book example: CardManager class has method updateLimit() which has direct access to an instance variable in Card class. Hiding the instance variable and providing setters and getters within Card would be a valuable refactoring.