public static PipeConfigNodeRuntimeAgent runtime() {
    return PipeConfigNodeAgentHolder.HANDLE.pipeConfigNodeRuntimeAgent;
  }
Get the singleton instance of {@link PipeConfigNodeRuntimeAgent}.

@return the singleton instance of {@link PipeConfigNodeRuntimeAgent}
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/manager/pipe/agent/PipeConfigNodeAgent.java