private PersistentMemberID readPMID(CountingDataInputStream dis)
      throws IOException, ClassNotFoundException {
    int len = dis.readInt();
    byte[] buf = new byte[len];
    dis.readFully(buf);
    return bytesToPMID(buf);
  }
Reads a class name from the given input stream.

@return class name
geode-core/src/main/java/org/apache/geode/internal/cache/persistence/DiskInitFileParser.java