typeclass-implicitly.scala

// [A: Serialiser] means the compiler expects an implicit Serialiser 
// needs to be available for A
def writeJsonToDisk[A: Serialiser](item: A){
  def writeToDisk(x:String){println(s"I saved [$x] to disk, honest!")}
  
  // Access the parameter with implicity
  writeToDisk(implicitly[Serialiser[A]].toJson(item))
}