@Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((name == null) ? 0 : name.hashCode());
   result = prime * result + ((parameters == null) ? 0 : parameters.hashCode());
   result = prime * result + ((type == null) ? 0 : type.hashCode());
   return result;
 }