Dart mixins

our animations we had to add something called … a Single Ticker Provider State Mixin … to our Welcome Screen State class. … And we did that using the with keyword. … And so in this lesson we're going to do a deep dive … on exactly what these mixins are … and why we need them. … Now the first thing to keep in mind is … And it tells you that mixins are a way of reusing … a class's code in multiple class hierarchies. … So while we are going through this lesson … keep this sentence in mind. … In order to explain how mixins work … I'm going to dive straight into the code. … So let's build a new class. … And let's call it animal. … Now, animals … have this one behavior … that they share and its the fact that they can move. … So we're going to build a method for our animal class … to describe how they behave. Mainly, how they move. … Right? So if you're an animal you might move by, … let's say for simplicity sake, … you'll print changed position. Right? … So every time you move you're probably …