public OutofGumball(GumballMachine gumballMachine)
{
this.gumballMachine = gumballMachine;
}
public NoQuarter(GumballMachine gumballMachine)
{
this.gumballMachine = gumballMachine;
}
public GumballSold(GumballMachine gumballMachine)
{
this.gumballMachine = gumballMachine;
}