BloombergLP::bdld::Datum::isExternalReference

Return true if this object represents a reference to an externally managed array, string or user-defined object and false otherwise. If this method returns false, calling destroy on this object will release the memory used by the array, string, or used-defined object as well as any meta-data directly used by this datum (e.g., length information); otherwise (if this method returns true) calling destroy on this object will release any allocated meta-data, but will not impact the externally managed array, string, or user-defined object.