// identifiers
for (ExternalIdBundle identifiers : externalIdBundle) {
ExternalId preferredId = getPreferredIdentifier(identifiers, dataProvider);
s_logger.debug("Resolved preferred identifier {} from identifier bundle {}", preferredId, identifiers);
String bbgKey = BloombergDomainIdentifierResolver.toBloombergKeyWithDataProvider(preferredId, dataProvider);
securitiesElem.appendValue(bbgKey);
reverseBundleMap.put(bbgKey, identifiers);
}
// field required
Element fieldElem = request.getElement(BLOOMBERG_FIELDS_REQUEST);