code: def search(self):
          
  
          self.__interrupt_search()
  
          search_pattern = self.Search_comboBox.currentText()
          replacement_pattern = self.Replace_With_comboBox.currentText()
          if not search_pattern:
              return False
  
          SearchAndReplace.insert_pattern(search_pattern, self.__search_patterns_model)
          SearchAndReplace.insert_pattern(replacement_pattern, self.__replace_with_patterns_model)
  
          location = umbra.ui.common.parse_location(
              foundations.strings.to_string(self.Where_lineEdit.text()) or
              self.__targets_format.format(self.__default_target))
          self.__ignore_hidden_files and location.filters_out.append("\\\.|/\.")
  
          settings = self.__get_settings()
  
          self.__search_worker_thread = Search_worker(self, search_pattern, location, settings)
          # Signals / Slots.
          self.__search_worker_thread.searchFinished.connect(self.__search_worker_thread__searchFinished)
  
          self.__container.engine.worker_threads.append(self.__search_worker_thread)
          self.__container.engine.start_processing("Searching In Files ...")
          self.__search_worker_thread.start()
          return True
docs: Searchs user defined locations for search pattern.
  
          :return: Method success.
          :rtype: bool