docs: public static void verifyForHdfsUse(String sb) throws IllegalArgumentException {
          Preconditions.checkArgument(
                  sb != null && !sb.trim().isEmpty(),
                  "null or empty hdfs endpoint"
                  );
  
          int mask = conversionMaskFor(sb);
          boolean hasDateConversion = (mask & DATE) == DATE;
  
          Preconditions.checkArgument(
                  (mask & HDFS_MASK) == HDFS_MASK,
                  "hdfs endpoint \"" + sb
                  + "\" must contain the (%t)able, the (%p)artition, and the (%g) generation conversions"
                  );
  
          final String tn = "__IMPROBABLE_TABLE_NAME__";
          final int pn = Integer.MIN_VALUE;
          final long gn = Long.MIN_VALUE;
          final Date dt = new Date(0);
          final String fmtd = hasDateConversion ? new SimpleDateFormat(DATE_FORMAT).format(dt) : "";
  
          URI uri = URI.create(expand(sb, tn, pn, gn, dt));
          String path = uri.getPath();
  
          List<String> missing = new ArrayList<>();
          if (!path.contains(tn)) missing.add("%t");
          if (!path.contains(Integer.toString(pn))) missing.add("%p");
          if (!path.contains(Long.toString(gn,Character.MAX_RADIX))) missing.add("%g");
          if (hasDateConversion && !path.contains(fmtd)) missing.add("%d");
  
          if (!missing.isEmpty()) {
              String notInPath = Joiner.on(", ").join(missing);
              throw new IllegalArgumentException(
                      "hdfs enpoint \"" + sb
                      + "\" does not contain conversion(s) " + notInPath
                      + " in the path element of the URL");
          }
      }