code: private Set<PackageResourceReferenceWrapper> addFoundPackageResourceReferences(
  		Set<PackageResourceReferenceWrapper> packageResourceReferences, final Class<?> iface)
  	{
  		final Set<PackageResourceReferenceWrapper> prr = PackageResourceReferences.getInstance()
  			.getPackageResourceReferenceMap().get(iface);
  		if ((packageResourceReferences != null) && !packageResourceReferences.isEmpty())
  		{
  			if ((prr != null) && !prr.isEmpty())
  			{
  				packageResourceReferences.addAll(prr);
  			}
  			else
  			{
  
  			}
  		}
  		else
  		{
  			if ((prr != null) && !prr.isEmpty())
  			{
  				packageResourceReferences = prr;
  			}
  		}
  		return packageResourceReferences;
  	}
docs: Adds the found package resource references.
  
  @param packageResourceReferences
  the package resource references
  @param iface
  the iface
  @return the sets the