@spec mismatches(t(), term()) :: [Machete.Mismatch.t()] | nil

Examines the value of the passed term and returns the way(s) in which it does not conform to the base type instance's requirements, expressed as a list of Machete.Mismatch structs. If there are no such mismatches (that is, if the passed term 'matches' against the base type instance), implementations of this protocol may return an empty list or nil; they are semantically equivalent and are both allowed for ease of implementation. Implementors of this protocol may be interested in the Machete.Mismatch.mismatch/2 function to easily create mismatches

Note that the argument order to this function is the opposite of that for the ~> and ~>> operators; conformance to this protocol is a property of the match, and not the term being matched