public HondaMotosikletBuilder()
 {
     _motosiklet = new Motosiklet
     {
         Marka = "Honda",
         Model = "CRF"
     };
 }
 public YamahaMotosikletBuilder()
 {
     _motosiklet = new Motosiklet
     {
         Marka = "Yamaha",
         Model = "R25"
     };
 }