//GetCommission gets Commission, Tag 12
func (m ExecutionReport) GetCommission() (v decimal.Decimal, err quickfix.MessageRejectError) {
	var f field.CommissionField
	if err = m.Get(&f); err == nil {
		v = f.Value()
	}
	return
}
//GetCommission gets Commission, Tag 12
func (m NewOrderSingle) GetCommission() (v decimal.Decimal, err quickfix.MessageRejectError) {
	var f field.CommissionField
	if err = m.Get(&f); err == nil {
		v = f.Value()
	}
	return
}
//GetCommission gets Commission, Tag 12
func (m OrderCancelReplaceRequest) GetCommission() (v decimal.Decimal, err quickfix.MessageRejectError) {
	var f field.CommissionField
	if err = m.Get(&f); err == nil {
		v = f.Value()
	}
	return
}