code: public ZooActionBuilder extract(String jsonPath, String variableName) {
          JsonPathVariableExtractor jsonPathVariableExtractor = new JsonPathVariableExtractor();
          Map<String, String> pathVariableMap = new HashMap<>();
          pathVariableMap.put(jsonPath, variableName);
          jsonPathVariableExtractor.setJsonPathExpressions(pathVariableMap);
          action.addVariableExtractors(jsonPathVariableExtractor);
          return this;
      }
docs: Adds variable extractor for extracting variable from command response.
  
  @param jsonPath the json path to reference the value to be extracted
  @param variableName the name of the variable to store the extracted value in
  @return