Scala: How to append varargs parameters to an ArrayBuffer

As a brief note, if you need to use a varargs parameter with a Scala method, and those varargs parameters should be added to an ArrayBuffer, I can confirm that this code works with Scala 2.13:

import scala.collection.mutable.ArrayBuffer
val xs = ArrayBuffer[String]()

// add one element to the ArrayBuffer
xs += "a"   // ArrayBuffer(a)

// now create a method with a varargs parameter
def appendStrings(strings: ArrayBuffer[String], varargsStrings: String*): Unit = 

// now add multiple varargs parameters to the ArrayBuffer
appendStrings(xs, "b", "c")
xs   // ArrayBuffer(a, b, c)

I just confirmed that this code works with Scala 2.13 and Scala 3.0.0