@Override
  public List<Procedure<?>> getProcedures() throws IOException {
    if (cpHost != null) {
      cpHost.preGetProcedures();
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    List<Procedure<?>> procList = (List) this.procedureExecutor.getProcedures();

    if (cpHost != null) {
      cpHost.postGetProcedures(procList);
    }

    return procList;
  }
List namespace names
@return All namespace names
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java