Function.dart

void main() {
  var prettyFunc = new PrettyPrint();
  print(prettyFunc is Function);              // true
  prettyFunc.call("A", "Dart is cool", "B"); // A Dart is cool B
  prettyFunc("C", "Dart is cool", "D");      // C Dart is cool D
  
  var args = ["E", "Dart is cool", "F"];     // E Dart is cool F
  Function.apply(prettyFunc, args);
}

class PrettyPrint {
  call(prefix, msg, sufix) => 
    print("$prefix $msg $sufix");
}