/// <summary>
/// To use multi criteria to eagerly load multiple child collection, if the first detached criteria has child collection to query,
/// then must use .SetResultTransformer(new DistinctRootEntityResultTransformer() for the first detached criteria
/// </summary>
/// <typeparam name="TRoot">The type of the root.</typeparam>
/// <param name="multiCriteria">The multi criteria.</param>
/// <param name="rootCriterion">The root criterion.</param>
/// <param name="associationPropertyExpression">The association property expression.</param>
/// <param name="orders">The orders.</param>
/// <param name="returnDistinctRoot">If set to <c>true</c> [return distinct root].</param>
/// <returns>A <see cref="IMultiCriteria"/></returns>
public static IMultiCriteria AddDetachedCriteriaForChild <TRoot> (
this IMultiCriteria multiCriteria,
ICriterion rootCriterion,
Expression <Func <TRoot, object> > associationPropertyExpression,
IEnumerable <Order> orders = null,
bool returnDistinctRoot = false)
{
var detachedCriteria = DetachedCriteriaUtil.CreateDetachedCriteriaForChild(
rootCriterion,
associationPropertyExpression);
return(multiCriteria.AddDetachedCriteria(detachedCriteria, orders, returnDistinctRoot));
}