code: public AptField getField(String name)
      {
          for (AptField genField : _contexts)
              if (genField.getName().equals(name))
                  return genField;
          for (AptField genField : _clients)
              if (genField.getName().equals(name))
                  return genField;
  
          return null;
      }
docs: Returns the field with the specified name