Generates an instance of the declaring element when the UxmlElementAttribute is used in a custom control.
| CreateInstance | Returns an instance of the declaring element. |
| Deserialize | Applies serialized field values to a compatible visual element. |
| Register | This is used by the code generator when a custom control is using the UxmlElementAttribute. You should not need to call it. |
| ShouldWriteAttributeValue | Determines if an attribute should be applied during Deserialize. |