class Person()
  function Person( this, name, age )
    this.name := name;
    this.age := age;
  endfunction

  function greeting( this )
    return $"Hello, my name is {this.name} and I am {this.age} years old.";
  endfunction

  function rename( this, new_name )
    this.name := new_name;
    Print( $"Name changed to {this.name}" );
  endfunction
endclass

var john := Person( "John", 30 );
var greeting := john.greeting();

Print( greeting ); // Output: Hello, my name is John and I am 30 years old.

john.rename( "Johnny" ); // Output: Name changed to Johnny