Ensurers

An ensurer is a decorator that can be placed on getters, setters, and actions, and it will run ahead of these functions. The intended behaviour is performing checks ahead of running the function - for example checking if a laser is connected ahead of trying to set its power. This way one ensurer can be written and used in multiple places easily.

See https://puzzlepiece.readthedocs.io/en/latest/puzzlepiece.piece.html#puzzlepiece.piece.ensurer for examples