// Set various properties
        System.setProperty("app.module.feature1", "enabled");
        System.setProperty("app.module.feature2", "disabled");
        System.setProperty("app.service.api", "v2");
        System.setProperty("config.app.module", "test");

        // Test with complex regex
        execJob.testAddFessCustomSystemProperties(cmdList, "app\\.module\\..*");

import java.io.InputStream;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.fess.app.pager.SynonymPager;
import org.codelibs.fess.app.service.SynonymService;
import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.admin.dict.synonym.UploadForm;
import org.codelibs.fess.app.web.api.ApiResult;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;

import org.codelibs.fess.app.service.FailureUrlService;
import org.codelibs.fess.ds.DataStore;
import org.codelibs.fess.ds.DataStoreFactory;
import org.codelibs.fess.ds.callback.IndexUpdateCallback;
import org.codelibs.fess.entity.DataStoreParams;

package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

import org.codelibs.fess.app.service.LabelTypeService;
import org.codelibs.fess.entity.SearchRequestParams.SearchRequestType;
import org.codelibs.fess.helper.LabelTypeHelper.LabelTypePattern;
import org.codelibs.fess.opensearch.config.exentity.LabelType;

import java.lang.reflect.Field;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicReference;

import org.codelibs.fess.Constants;
import org.codelibs.fess.app.service.ScheduledJobService;
import org.codelibs.fess.app.web.api.ApiResult;
import org.codelibs.fess.app.web.api.ApiResult.ApiStartJobResponse;
import org.codelibs.fess.opensearch.config.exentity.ScheduledJob;

        private static final long serialVersionUID = 1L;

        @Override
        public String getSlackWebhookUrls() {
            return "https://hooks.slack.com/services/test";
        }

        @Override
        public String getGoogleChatWebhookUrls() {
            return "https://chat.googleapis.com/v1/spaces/test/messages?key=test";
        }
    }

        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
        '503':
          description: Service unavailable
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object

        thumbnailQueueBhv.batchInsert(list);
    }

    /**
     * Generates thumbnails using the provided executor service.
     *
     * @param executorService the executor service for parallel processing
     * @param cleanup whether to run in cleanup mode
     * @return the number of tasks processed
     */

                path = path.substring(1);
            }
            return new File(tempDir, path.replace("/", File.separator)).getAbsolutePath();
        }

        @Override
        public void service(jakarta.servlet.ServletRequest req, jakarta.servlet.ServletResponse res) {
            // Not used in tests
        }

        // Implement other required methods with default/empty implementations
        @Override

import org.codelibs.core.exception.IORuntimeException;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.api.BaseApiManager;
import org.codelibs.fess.app.service.FavoriteLogService;
import org.codelibs.fess.entity.FacetInfo;
import org.codelibs.fess.entity.GeoInfo;
import org.codelibs.fess.entity.HighlightInfo;
import org.codelibs.fess.entity.PingResponse;