/// <summary>Perform the command</summary>
/// <param name="commandHistory">The command history.</param>
public void Do(CommandHistory commandHistory)
{
this.modelToAdd = Apsim.Add(parent, child);
// The add method above may have renamed the model to avoid a clash with the
// name of an existing model so just in case, reset the name for the tree.
nodeDescription.Name = this.modelToAdd.Name;
this.explorerView.Tree.AddChild(Apsim.FullPath(parent), nodeDescription);
this.modelAdded = true;
}