docs: public TomcatBoot configure(String configFile, String... extendsConfigFiles) {
          if (configFile == null || configFile.trim().length() == 0) {
              throw new IllegalArgumentException("The argument 'configFile' should not be null or empty: " + configFile);
          }
          if (extendsConfigFiles == null) {
              throw new IllegalArgumentException("The argument 'extendsConfigFiles' should not be null or empty: configFile=" + configFile);
          }
          this.configFile = configFile;
          this.extendsConfigFiles = extendsConfigFiles;
          return this;
      }