/// <summary>
/// Any subclass of AbstractSelectionModel that will provide the selection model for the grid (defaults to Ext.grid.RowSelectionModel if not specified).
/// </summary>
/// <param name="sm">sm</param>
/// <returns>An instance of TBuilder</returns>
public virtual TBuilder SelectionModel(AbstractSelectionModel sm)
{
this.ToComponent().SelectionModel.Add(sm);
return(this as TBuilder);
}
