Null-aware operator with Maps

Question

I had the same problem with lists, now it is Map.

What I would like to do

The following syntax is not Dart, as in it does not

Answer 1

Something like this might work as an extension function:

extension MapExtensions on Map {
  K getOrNull(T key) {
     if (this == null || !this.containsKey(key)) {
       return null;
     } else {
       return this[key];
     }
  }

  K getOrElse(T key, K fallback) {
    return this.getOrNull(key) ?? fallback;
  }
}

Note: I haven't tested this, but should work.