title: Multiple select with checkbox from dropdown in PrimeFaces
body: <p>In PrimeFaces, can we choose multiple elements from drop down list with the help of checkbox? 
  If my drop down is showing 5 elements, can I choose more than 1 element from the list?</p>
  
  <p>I know in primeFaces we have <code>&lt;p:selectOneMenu&gt;</code> which will allow me to choose one element, but do we have something like <code>&lt;p:selectMultipleMenu&gt;</code>?</p>
  
  <p>I was trying to find it out but not able to find something. Can you please let me know whether this is possible or not?</p>