code: def lookup_field_label(self, context, field, default=None):
          
          default = None
  
          for form_field in self.form:
              if form_field.name == field:
                  default = form_field.label
                  break
  
          return super(SmartFormMixin, self).lookup_field_label(context, field, default=default)
docs: Figures out what the field label should be for the passed in field name.
  
          We overload this so as to use our form to see if there is label set there.  If so
          then we'll pass that as the default instead of having our parent derive
          the field from the name.