/**
  * Constraints a property to be equal to a specified other property
  *
  * @param propertyName The property
  * @param otherPropertyName The other property
  * @return This criteria
  */
 public Criteria eqProperty(String propertyName, String otherPropertyName) {
   validatePropertyName(propertyName, "eqProperty");
   validatePropertyName(otherPropertyName, "eqProperty");
   addToCriteria(Restrictions.eqProperty(propertyName, otherPropertyName));
   return this;
 }