Sorry, just meant that when introducing a new parameter to a `@DataBoundConstructor` the safest practice is to rather _copy_ the constructor and modify your copy, deprecating the original so it is still available for possible use by other plugins. Thus

```
@DataBoundConstructor public Thing(int x) {…}
```

becomes

```
@Deprecated public Thing(int x) {this(x, DEFAULT_Y_VALUE);}
@DataBoundConstructor public Thing(int x, int y) {…}
```