Safe navigation operator not supported

[cedx]

In Views, I can't use the safe navigation operator introduced in Haxe 4.3.

Basically, it's the same issue as AlexHaxe/haxe-instrument#17:
the generated code does not check for null values.

For example:

Tooltip.getInstance(event.target)?.dispose();

Becomes:

Tooltip.getInstance(event.target).dispose();

Instead of something like:

let tmp = Tooltip.getInstance(event.target);
if (tmp != null) tmp.dispose();