full constructor this.onHand = onHand; this.quantity = quantity;
this.onHand = onHand; this.quantity = quantity;
minimum constructor this.quantity = quantity;
this.quantity = quantity;
default = "true" return(onHand);
return(onHand);
return(quantity);
default = "true" this.onHand = onHand;
this.onHand = onHand;