This covers a lot of the same things as my own blog post on the topic: https://briangordon.github.io/2014/09/covariance-and-contravariance.html https://briango

This covers a lot of the same things as my own blog post on the topic: https://briangordon.github.io/2014/09/covariance-and-contravariance.html https://briangordon.github.io/2014/09/covariance-and-contrav...