private static Expression GetTargetValidCheckOrNull(Type targetType, IMemberMapperData mapperData)
{
if (!mapperData.TargetMember.IsReadable || mapperData.TargetIsDefinitelyUnpopulated())
{
return(null);
}
var targetIsOfDerivedType = GetTargetIsDerivedTypeCheck(targetType, mapperData);
if (mapperData.TargetIsDefinitelyPopulated())
{
return(targetIsOfDerivedType);
}
var targetIsNull = mapperData.TargetObject.GetIsDefaultComparison();
var targetIsValid = Expression.OrElse(targetIsNull, targetIsOfDerivedType);
return(targetIsValid);
}