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In this basic example, I am using as most as possible features of basic features of the class definition in Flutter. 

				
					class Hello {
  var hello;                          // public
  var _name;                          // private
  sayHello() {
    return "$hello ${this.name}";     // string iterpolation
  }
  get name => _name;                  // getter
  set name(value) => _name = value;   // setter 
}
 main() {
   var cHello = "Hello";              // no type annotation
   final String cName = "John";       // typed annotation + final 
    var myHello = new Hello();        // instance creator
    myHello.hello = cHello;           // assignments
    myHello.name = cName;
    print(myHello.sayHello());
}