@Override
  public void write(int b) throws IOException {
    super.write(b);
    OutputStream os = branch;
    if (os != null) {
      os.write(b);
    }
  }
Delegates all operations to the original underlying OutputStream and a mutable branch
OutputStream.

@since GemFire 7.0
geode-common/src/main/java/org/apache/geode/util/internal/TeeOutputStream.java