def _var_field_name(self) -> str:
        """The name of the field.

        Returns:
            The name of the field.
        """
        var_data = self._get_all_var_data()
        field_name = var_data.field_name if var_data else None
        return field_name or self._js_expr
The name of the field.

        Returns:
            The name of the field.
        
reflex/vars/base.py