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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This has the distinct code-smell of needless complexity.
It is harder to descipher then a simple calculation because all the
logic is spread out. Classes and abstractions should be added once
you need them, not as a general rule.
You can read more on the how and why in the book Clean Code by Robert C. Martin
which I feel is required reading for any professional developer.