// create a new deploy event that has same event information, but tied to different item instance (i.e. for items deployed for same event)
public DeployEvent(DeployEvent deployEvent, ItemInstance itemInstance) : this()
{
deployDate = deployEvent.deployDate;
deployBy = deployEvent.deployBy;
recoverDate = deployEvent.recoverDate;
recoverBy = deployEvent.recoverBy;
notes = deployEvent.notes;
this.itemInstance = itemInstance;
}