Kotlin allows you to overload the += for your own classes.  You just create a function called plusAssign such that a += b translates to	a.plusAssign(b)<p><a href="https:&#x2F;&#x2F;kotlinlang.org&#x2F;docs&#x2F;reference&#x2F;operator-overloading.html" rel="nofollow">https:&#x2F;&#x2F;kotlinlang.org&#x2F;docs&#x2F;reference&#x2F;operator-overloading.h...</a>