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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.
Your IDE is correct.
The reason why it works in this case is because one of these return statements will be always executed.
The condition 'name.toUpperCase().startsWith("R")' is either true or false. And you have one return statement for each of these possibilities. There is no condition that would lead elsewhere.