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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.
The code above isn't formatted properly and can't be considered as "Best Practices".
Google(https://google.github.io/styleguide/javaguide.html#s4.6.2-horizontal-whitespace) advises to have whitespaces "On both sides of any binary or ternary operator."
Oracle(https://www.oracle.com/technetwork/java/codeconventions-150003.pdf) advises the same: "All binary operators except . should be separated from their operands by spaces."