let bird = {
name: "Donald",
numLegs: 2
};

let boat = {
name: "Warrior",
type: "race-boat"
};

// Add your code below this line
let glideMixin = function(obj) {
  obj.glide = function() {
    console.log("Flying, wooosh!");
  };
};
glideMixin(bird);
glideMixin(boat);
bird.glide();
boat.glide();