Rails: Run a script after loading a library with async: true

So let's say I want to load the following library asynchronously:

<%= javascript_include_tag "//code.jquery.com/ui/1.11.2/jquery-ui.js", async:true %>

Now, I want to run the following code after loading the library:

<script>
  $('#business_name').autocomplete({ source: '/businesses_finder' });
</script>

How is this done?

It would be really cool if I could call a function following async loading.. Like:

async:true, callback_function: 'autocomplete'

function autocomplete() { 
  $('#business_name').autocomplete({ source: '/businesses_finder' });
}