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