Want to be able to bring in the declarative nature that a functional programming language feature of the pattern matching and the switch statement. With the destructors the only thing left was to find the correct structure then move move forward. Using a structure in chainable fashion allows for a syntax that works with typescript while looking similar to matches statements in other languages

Use: matches('a value').when(matches.isNumber, (aNumber) => aNumber + 4).defaultTo('fallback value')