isSaving

Returns if the instance is currently being saved.

`instance.isSaving()`

Observes if a promise returned by connection.save is in progress for this instance. This is often used in a template like:

<button ($click)="todo.save()"
   {{#todo.isSaving}}disabled{{/todo.isSaving}}>
  Save Changes
</button>

{Boolean}:

true if connection.save has been called for this instance but the returned promise has not yet resolved.