@RestrictedApi(explanation = "Should only be called in tests", link = "",
      allowedOnPath = ".*/src/test/.*")
  public boolean hasNode(TRemote key) {
    return nodeMap.containsKey(key);
  }
Account of what procedures are running on remote node.
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/RemoteProcedureDispatcher.java