Too much code in the DG

[nus-pe-bot]

Note from the teaching team: This bug was reported during the Part II (Evaluating Documents) stage of the PE. You may reject this bug if it is not related to the quality of documentation.

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There should be as little implementation detail included in the DG as possible.

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_{[original: nus-cs2103-AY2021S1/pe-interim#6038]}

[Lingy12]

Team's Response

Because this is a special use of Enum, so we think it is necessary to have implementation detail here.

Duplicate status (if any):

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