public OFVendorDataType lookupVendorDataType(int vendorDataType){
  return dataTypeMap.get(Long.valueOf(vendorDataType));
}

public OFVendorDataType lookupVendorDataType ( int vendorDataType ) { return dataTypeMap . get ( Long . valueOf ( vendorDataType ) ) ; }
lookup the ofvendordatatype instance that has been registered with this vendor id .
