[Proposed] Sort Feature

Proposed Implementation

The proposed sort feature is a concrete implementation of the {abstract} Command class. It is facilitated by ExpenseBook.

SortCommand will make use of ExpenseBook's following operations

• ExpenseBook#sort(key = )

These operations are exposed in the Model interface as Model#Sort...?

Given below is an example usage scenario and how the sort mechanism behaves at each step

<STEP BY STEP>

<SEQUENCE DIAGRAM>

<ACTIVITY DIAGRAM>

Design Consideration