code: public Query addValueRefinement(String navigationName, String value, boolean exclude) {
      return addRefinement(navigationName, new RefinementValue().setValue(value).setExclude(exclude));
    }
docs: <code>
  Add a value refinement.  Takes a refinement name, a value, and whether or not to exclude this refinement.
  </code>
  
  @param navigationName
  The name of the navigation
  @param value
  The refinement value
  @param exclude
  True if the results should exclude this value refinement, false otherwise