title: Angular 2 multiselect dropdown in angular 4
body: <p>I have followed this in one of my machine. working fine.(In that machine I was having all of my imports in app module)
  <a href="https://www.npmjs.com/package/angular-2-dropdown-multiselect" rel="nofollow noreferrer">https://www.npmjs.com/package/angular-2-dropdown-multiselect</a></p>
  
  <p>Then I have another machine where Each functionality is having different module. so i want to use it in my dashboard module. so tried importing it in my dashboard module, it throws an error, then I tried importing in my app module. still throwing an error, then tried at both the places, still throwing an error. what wrong am I doing?</p>