private EOQualifier _qualifierForKeyValueOperator(String key, Object value, NSSelector op) {
Object aValue = value;
try {
EOClassDescription classDescription = _dataSource != null ? _dataSource.classDescriptionForObjects() : null;
aValue = classDescription != null ? classDescription.validateValueForKey(aValue, key) : aValue;
} catch (NSValidation.ValidationException e) {
NSLog._conditionallyLogPrivateException(e);
}
NSSelector knownOp;
if (op == EOQualifier.QualifierOperatorEqual) {