(self, value)
| 882 | return set(self.value_col.validate(v) for v in val) |
| 883 | |
| 884 | def to_python(self, value): |
| 885 | if value is None: |
| 886 | return set() |
| 887 | return set(self.value_col.to_python(v) for v in value) |
| 888 | |
| 889 | def to_database(self, value): |
| 890 | if value is None: |