title: Search 2 text fields as 1 field
body: <p>I'm to search users by name and I've the properties: <code>firstName</code> and <code>lastName</code>. If I had a property <code>fullName</code> this would be trivial but I don't have it.</p>
  
  <p>I want to search for "Peter Robert" and I need to combine theses 2 fields into 1 before searching.</p>
  
  <p>How do I do it?</p>