How do I get the OID from a MibSymbol?
An OID is stored in the ObjectIdentifierValue class. Only MibValueSymbols have a value and even then not all values are OID:s. The proper way to get the OID is to first check for a MibValueSymbol and then for an ObjectIdentiferValue with the instanceof operator. See the extractOid() method in the brief introduction for a source code example.