static O[] massageArgsForVarArgsCall(Executable m, O[] args) {

  Class<?>[] types = m.getParameterTypes();

  int n = types.length-1, nArgs = args.length;

  if (nArgs < n) null;

  for i to n:

    if (!argumentCompatibleWithType(args[i], types[i]))

      null;

  Class varArgType = types[n].getComponentType();

  for (int i = n; i < nArgs; i++)

    if (!argumentCompatibleWithType(args[i], varArgType))

      null;

  O[] newArgs = new O[n+1];

  arraycopy(args, 0, newArgs, 0, n);

  O[] varArgs = arrayOfType(varArgType, nArgs-n);

  arraycopy(args, n, varArgs, 0, nArgs-n);

  newArgs[n] = varArgs;

  ret newArgs;

}