code: def get_field_settings(self):
          
          field_settings = None
          if self.field_settings:
              if isinstance(self.field_settings, six.string_types):
                  profiles = settings.CONFIG.get(self.PROFILE_KEY, {})
                  field_settings = profiles.get(self.field_settings)
              else:
                  field_settings = self.field_settings
          return field_settings
docs: Get the field settings, if the configured setting is a string try
          to get a 'profile' from the global config.