pushObject (obj) public
 Defined in packages/ember-runtime/lib/mixins/mutable_array.js:164 
 Push the object onto the end of the array. Works just like push() but it is KVO-compliant. let colors = ['red', 'green'];
colors.pushObject('black');     // ['red', 'green', 'black']
colors.pushObject(['yellow']);  // ['red', 'green', ['yellow']]
 
 Parameters: 
obj *
  object to push  
 Returns:  object same object passed as a param