title: Get a sublist of a hashmap
body: <p>Lets say I have a <code>hashmap</code> with key <code>String</code> and value is also a <code>String</code>. I want to extract for a certain <code>key</code> element range a sublist(like with the <code>sublist</code> function of <code>List</code>) of the <code>values</code> of the map. </p>
  
  <p>How could that be realized?</p>