What Is a Conflict?

Imagine that you have a library/file to hold all common extensions of a project. Let’s say this file is called ‘extensions_lib.dart’.

The ‘extensions_lib’ has two extensions:

• An extension on List type named MyList.
• An extension on double type named MyDouble.

MyList Extension

The MyList extension defines a method firstItem() that returns the first element of the list. The return type is generic which is also represented as T. You will learn more about generics later in the course.

extension MyList<T> on List<T> {
    //Returns the first item in this list
    T first() => this[0];
}

MyDouble extension

The MyDouble ...