@Override
  public String toString() {
    return remoteMember + "(uid=" + uniqueId + ")"
        + (remoteVersion != null && remoteVersion != KnownVersion.CURRENT
            ? "(v" + remoteVersion + ')' : "");
  }
Return the version of the member on the other side of this connection.
geode-core/src/main/java/org/apache/geode/internal/tcp/Connection.java