}
String aggregatorName = (String) data.get("aggregatorName");
String marketDataType = (String) data.get("marketDataType");
String versionDateTime = (String) data.get("versionDateTime");
MarketDataSpecification marketDataSpec;
EnumSet<ViewExecutionFlags> flags;
VersionCorrection versionCorrection;
if (versionDateTime != null) {
Instant versionAsOf = Instant.parse(versionDateTime);
versionCorrection = VersionCorrection.ofVersionAsOf(versionAsOf);