case LEAST_CONNECTIONS:
                return channels.stream()
                        .min((c1, c2) -> Integer.compare(c1.getActiveConnections(), c2.getActiveConnections()))
                        .orElse(channels.get(0));

            case RANDOM:
                return channels.get((int) (Math.random() * channels.size()));

            case FAILOVER_ONLY:
            default:

                throwValidationError(messages -> messages.addErrorsFailedToDeleteFile(GLOBAL, form.fileName), this::asListHtml);
            }
        }).orElse(() -> {
            throwValidationError(messages -> messages.addErrorsTargetFileDoesNotExist(GLOBAL, form.fileName), this::asListHtml);
        });

        }
        return Optional.empty();
    }

    @Override
    public Optional<Boolean> showErrors() {
        if (commandLine.hasOption(CLIManager.SHOW_ERRORS) || verbose().orElse(false)) {
            return Optional.of(Boolean.TRUE);
        }
        return Optional.empty();
    }

    @Override
    public Optional<String> failOnSeverity() {

            if (logger.isDebugEnabled()) {
                logger.debug("username={}", Arrays.toString(username));
            }
            return new SpnegoCredential(username[0]);
        }).orElse(null);

    }

    /**
     * SPNEGO filter configuration implementation.
     *
     * This inner class provides configuration parameters for the SPNEGO filter,

        // ----------------------------------------------------------------------

        Map<String, String> userSpecifiedProperties = context.options != null
                ? new HashMap<>(context.options.userProperties().orElse(new HashMap<>()))
                : new HashMap<>();
        createInterpolator().interpolate(userSpecifiedProperties, paths::get);

        // ----------------------------------------------------------------------

     * @return corresponding channel or null
     */
    public ChannelInfo getChannelForTransport(SmbTransport transport) {
        return channels.values().stream().filter(c -> c.getTransport() == transport).findFirst().orElse(null);
    }

    /**
     * Remove a channel
     *
     * @param channel channel to remove
     */
    public void removeChannel(ChannelInfo channel) {

                .filter(artifact ->
                        Objects.equals(requestedRepositoryConflictId, ArtifactIdUtils.toVersionlessId(artifact)))
                .findFirst()
                .orElse(null);
    }

    /**
     * Determines whether the specified artifact refers to test classes.
     *
     * @param artifact The artifact to check, must not be {@code null}.

    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public ActionResponse list(final OptionalThing<String> id) {
        saveToken();
        return id.filter(StringUtil::isNotBlank).map(s -> asListHtml(decodePath(s))).orElse(redirect(getClass()));
    }

    /**
     * Uploads a file to the storage system.
     *
     * @param form the item form containing file and path information

                    CrawlingInfo crawlingInfo = crawlingInfoBhv.selectEntity(cb -> {
                        cb.query().setSessionId_Equal(sessionId);
                        cb.specify().columnSessionId();
                    }).orElse(null);//TODO
                    if (crawlingInfo == null) {
                        crawlingInfo = new CrawlingInfo();
                        crawlingInfo.setSessionId(list.get(0));

            builder.setQuery(QueryBuilders.idsQuery().addIds(id));
            builder.setFetchSource(fields, null);
            return true;
        }).orElse(null);
    }

    /**
     * Retrieves a list of documents whose IDs start with the specified prefix.
     *
     * @param searchEngineClient the search engine client to use for retrieval