code: def lookup_field_help(self, field, default=None):
          
          help = None
  
          # is there a label specified for this field
          if field in self.field_config and 'help' in self.field_config[field]:
              help = self.field_config[field]['help']
  
          # if we were given a default, use that
          elif default:
              help = default
  
          # try to see if there is a description on our model
          elif hasattr(self, 'model'):
              for model_field in self.model._meta.fields:
                  if model_field.name == field:
                      help = model_field.help_text
                      break
  
          return help
docs: Looks up the help text for the passed in field.