docs: def save(self):
          """Save the changes to the instance and any related objects."""
  
          # first call save with commit=False for all Forms
          for form in self._forms:
              if isinstance(form, BaseForm):
                  form.save(commit=False)
  
          # call save on the instance
          self.instance.save()
  
          # call any post-commit hooks that have been stashed on Forms
          for form in self.forms:
              if isinstance(form, BaseForm):
                  if hasattr(form, 'save_m2m'):
                      form.save_m2m()
                  if hasattr(form, 'save_related'):
                      form.save_related()
  
          # call save on any formsets
          for form in self._forms:
              if isinstance(form, BaseFormSet):
                  form.save(commit=True)
  
          return self.instance