title: how is the object relation of ComputedProperty and Binding?
body: <p>I cannot figure out where the <code>ComputedProperty</code> inherits or imports the <code>oneWay</code> method of Binding.
  Whats the api here?</p>
  
  <pre><code>Todos.TodoController = Ember.ObjectController.extend({
      isEditing: false,
  
      // We use the bufferedTitle to store the original value of
      // the model's title so that we can roll it back later in the
      // `cancelEditing` action.
      bufferedTitle: Ember.computed.oneWay('title')
  </code></pre>