/// <summary>
/// Creates a select operator query expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression.
/// </summary>
/// <param name="source">The <see cref="Source"/> child node of the result.</param>
/// <param name="selector">The <see cref="Selector"/> child node of the result.</param>
/// <returns>This query expression if no children are changed or an expression with the updated children.</returns>
public SelectOperator Update(MonadMember source, QueryTree selector)
{
if (source == Source && selector == Selector)
{
return(this);
}
return(QueryExpressionFactory.Select(ElementType, InputElementType, source, selector));
}
