} else {
                        processArgs.add("sh");
                        processArgs.add("-c");
                    }
                    processArgs.add(String.join(" ", Arrays.asList(input.args())));
                    builder.command(processArgs);
                    builder.directory(shellContext.cwd.get().toFile());
                    Process process = builder.start();

   *
   * {@snippet :
   * for (List<String> perm : orderedPermutations(asList("b", "c", "a"))) {
   *   println(perm);
   * }
   * // -> ["a", "b", "c"]
   * // -> ["a", "c", "b"]
   * // -> ["b", "a", "c"]
   * // -> ["b", "c", "a"]
   * // -> ["c", "a", "b"]
   * // -> ["c", "b", "a"]
   *
   * for (List<Integer> perm : orderedPermutations(asList(1, 2, 2, 1))) {
   *   println(perm);
   * }
   * // -> [1, 1, 2, 2]

    
    // Update cache if we have a directory lease
    if (directoryLeaseManager != null && directoryLeaseKey != null) {
        directoryLeaseManager.updateDirectoryCache(getPath(), Arrays.asList(files));
    }
    
    return files;
}

@Override
public boolean exists() throws IOException {
    if (isDirectory() && directoryLeaseManager != null) {
        // Check parent directory cache first

            sge.setLength(data.remaining());
            sge.setLkey(disniRegion.getLocalKey());
            sgeList.add(sge);
            
            sendWR.setSg_list(sgeList);
            endpoint.postSend(Arrays.asList(sendWR)).execute().free();
            
        } catch (Exception e) {
            throw new IOException("RDMA send failed", e);
        }
    }
    
    @Override

        return redirect(getClass());
    }

    // ===================================================================================
    //                                                                        Assist Logic
    //                                                                        ============
    /**
     * Creates a duplicate host entity based on the form and current user context.
     *

        }
    }

    // ===================================================================================
    //                                                                        Assist Class
    //                                                                        ============
    public static class SearchRequestParams {

        private Boolean explain;

        private Float minScore;

        }
    }

    // ===================================================================================
    //                                                                        Assist Class
    //                                                                        ============
    public static class SearchRequestParams {

        private Boolean explain;

        private Float minScore;

        return redirect(getClass());
    }

    // ===================================================================================
    //                                                                        Assist Logic
    //                                                                        ============

    // ===================================================================================

        return redirect(getClass());
    }

    // ===================================================================================
    //                                                                        Assist Logic
    //                                                                        ============

    // ===================================================================================

  @CanIgnoreReturnValue
  @SuppressWarnings("nullness") // TODO(cpovirk): Remove after we fix whatever the bug is.
  public final CollectorTester<T, A, R> expectCollects(R expectedResult, T... inputs) {
    List<T> list = Arrays.asList(inputs);
    doExpectCollects(expectedResult, list);
    if (collector.characteristics().contains(Collector.Characteristics.UNORDERED)) {
      Collections.reverse(list);
      doExpectCollects(expectedResult, list);