Named constructor

class Point { 
   num x, y; 
   
   Point(this.x, this.y); 

   // Named constructor 
   Point.origin() { 
      x = 0; 
      y = 0; 
   } 
}

Use a named constructor to implement multiple constructors for a class or to provide extra clarity.

Constructors are not inherited, which means that a superclass’s named constructor is not inherited by a subclass.