code: public static void createAndRegister() {
      synchronized (monitor) {
        checkState(handler == null, "OC-Agent exporter is already registered.");
        OcAgentTraceExporterHandler newHandler = new OcAgentTraceExporterHandler();
        registerInternal(newHandler);
      }
    }
docs: Creates a {@code OcAgentTraceExporterHandler} with default configurations and registers it to
  the OpenCensus library.
  
  @since 0.20