docs: public static File getVoltDbRoot(PathsType paths) {
          File voltDbRoot;
          if (paths == null || paths.getVoltdbroot() == null || VoltDB.instance().getVoltDBRootPath(paths.getVoltdbroot()) == null) {
              voltDbRoot = new VoltFile(VoltDB.DBROOT);
              if (!voltDbRoot.exists()) {
                  hostLog.info("Creating voltdbroot directory: " + voltDbRoot.getAbsolutePath());
                  if (!voltDbRoot.mkdirs()) {
                      hostLog.fatal("Failed to create voltdbroot directory \"" + voltDbRoot.getAbsolutePath() + "\"");
                  }
              }
          } else {
              voltDbRoot = new VoltFile(VoltDB.instance().getVoltDBRootPath(paths.getVoltdbroot()));
              if (!voltDbRoot.exists()) {
                  hostLog.info("Creating voltdbroot directory: " + voltDbRoot.getAbsolutePath());
                  if (!voltDbRoot.mkdirs()) {
                      hostLog.fatal("Failed to create voltdbroot directory \"" + voltDbRoot.getAbsolutePath() + "\"");
                  }
              }
          }
          validateDirectory("volt root", voltDbRoot);
  
          return voltDbRoot;
      }