docs: public synchronized HashtableEntry put(Object key, Object value, int len, long expirationTime, long validatorExpirationTime,
                                             byte[] serializedKey, byte[] serializedCacheValue, int valueHashcode, boolean isAliasId) // LI4337-17
      throws IOException,
                      EOFException,
                      FileManagerException,
                      ClassNotFoundException,
                      HashtableOnDiskException {
          if (key == null)
              return null;
          //if ( value == null ) return 0;  // comment this line to allow the value=NULL
  
          return mapPut(key, value, len, expirationTime, validatorExpirationTime, serializedKey, serializedCacheValue, valueHashcode, isAliasId); // LI4337-17
      }