estanglerbm commented on pull request #960:
URL: https://github.com/apache/royale-asjs/pull/960#issuecomment-735711686
Everywhere else that IDataInput / IDataOutput is used, there are conditional
imports. It was just missed in this area, as far as I can tell. So this isn't
something new.
Flex doesn't allow function overloading like you describe; it throws
`Error: Incompatible override.`
That is, it doesn't allow:
```
package a
{
public class Y {}
public class X extends Y {}
public class B { public function foo(c:Y):void {} }
public class A extends B { override public function foo(c:X):void {}
}
}
```
The IDataInput / IDataOutput changes are just copying over the conditional
imports from other areas.
The DataGroup change is something new.
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