dart syntax suggestion

[r-mzy47]

In dart language, this pattern is very familiar to all of us. for example in the flutter:

Widget(child: child != null ? SomeOderWidget(child: child) : null);

It appears mostly on every file and adds boilerplate to codes and reduces readability.
Is it possible to add some notation like !! to produce the same behaviour? something like:

Widget(child: SomeOderWidget(child: !!child));

Thanks in advance

[lrhn]

This suggestion is very similar to #361, so I'll consider it a duplicate of that discussion.