What problems can be solved by using mixins in Flutter?

Mixins allow adding functionality to existing classes without inheritance, solving the following problems:

• Single inheritance restriction: Flutter is based on Dart, where a class can only inherit from one parent class. Mixins enable "mixing in" multiple sets of behavior from different sources.
• Code duplication: Common functionality needed by several unrelated classes can be encapsulated in a mixin and reused.
• Placement of common widget logic: For example, TickerProvider logic for animation is often extracted into mixins (SingleTickerProviderStateMixin, TickerProviderStateMixin) and applied to a widget's State.

Example of using a mixin:

// Defining a mixin
mixin LoggingMixin {
  void log(String message) {
    print('[LOG] $message');
  }
}

// Using the mixin in a class
class MyService with LoggingMixin {
  void performAction() {
    log('Performing an action');
  }
}

// Using the mixin in another class
class AnotherService with LoggingMixin {
  void doSomethingElse() {
    log('Doing something else');
  }
}