public ReturnBicycleForm(Form m, Worker w)
{
InitializeComponent();
myCaller = m;
RentalCollection rc = new RentalCollection();
rc.populateWithRentedOutBikes();
bikeIDs = rc.getBikeIDs();
ChooseBicycleComboBox.Items.AddRange(bikeIDs);
currentWorker = w;
}