Check Map data types in generics
Solution 1:
The problem with E is Map is that the is operator is True if the object has the specified type, but the type of E is actually not E but rather type Type.
if (E is Type) {
print('Type!!!');
}
The problem with E == Map is that Map is a raw type which is equivalent to Map<dynamic, dynamic>. If E is any other type of Map you will get false.
What you can do is check the type of an instance of E rather than E itself. For example, something like:
void add(E element) {
if (element is Map) {
print('Map!!');
}
}