How to use the jsonpath-plus.JSONPath function in jsonpath-plus

return resolveData.usedRequestOptions.url;
    }
    else if (value === '$method') {
        return resolveData.usedRequestOptions.method;
    }
    else if (value === '$statusCode') {
        return resolveData.usedStatusCode;
    }
    else if (value.startsWith('$request.')) {
        // CASE: parameter is previous body
        if (value === '$request.body') {
            return resolveData.usedPayload;
            // CASE: parameter in previous body
        }
        else if (value.startsWith('$request.body#')) {
            const tokens = JSONPath.JSONPath({
                path: value.split('body#/')[1],
                json: resolveData.usedPayload
            });
            if (Array.isArray(tokens) && tokens.length > 0) {
                return tokens[0];
            }
            else {
                httpLog(`Warning: could not extract parameter '${paramName}' from link`);
            }
            // CASE: parameter in previous query parameter
        }
        else if (value.startsWith('$request.query')) {
            return resolveData.usedParams[Oas3Tools.sanitize(value.split('query.')[1])];
            // CASE: parameter in previous path parameter
        }
        else if (value.startsWith('$request.path')) {

try {
            output = proc.execSync(cmd);
        } catch (err) {
            throw new Error('Failed to refresh token: ' + err.message);
        }

        const resultObj = JSON.parse(output);

        const tokenPathKeyInConfig = config['token-key'];
        const expiryPathKeyInConfig = config['expiry-key'];

        // Format in file is {}, so slice it out and add '$'
        const tokenPathKey = '$' + tokenPathKeyInConfig.slice(1, -1);
        const expiryPathKey = '$' + expiryPathKeyInConfig.slice(1, -1);

        config['access-token'] = jsonpath.JSONPath(tokenPathKey, resultObj);
        config.expiry = jsonpath.JSONPath(expiryPathKey, resultObj);
    }
}

function extractToken(data: PreprocessingData, ctx: object) {
  const tokenJSONpath = data.options.tokenJSONpath
  const tokens = JSONPath.JSONPath({ path: tokenJSONpath, json: ctx })
  if (Array.isArray(tokens) && tokens.length > 0) {
    const token = tokens[0]
    return {
      access_token: token
    }
  } else {
    httpLog(
      `Warning: could not extract OAuth token from context at '${tokenJSONpath}'`
    )
    return {}
  }
}

async function responseBodyJsonPathMatches(path, value) {
    const { body } = await this.getResponse();
    const actualValue = JSONPath({ json: body, path })[0];
    expect(actualValue).to.match(new RegExp(value));
}

async function responseBodyJsonPathEquals(path, value) {
    const { body } = await this.getResponse();
    const actualValue = JSONPath({ json: body, path })[0];
    expect(actualValue).to.equalLoosely(this.replaceVars(value));
}

return obj.map(function (x) { return resolve(x, data, values, property); });
  }

  if (obj.jsonPath) {
    var params = typeof obj.jsonPath !== 'object' ? {
      path: obj.jsonPath
    } : obj.jsonPath;
    params.group = obj.group || params.group || property;
    params.cycle = obj.cycle || params.cycle || false;
    params.reverse = obj.reverse || params.reverse || false;
    params.count = obj.count || params.count || 1;
    var key = (params.group) + "__" + (params.path);

    if (!values[key]) {
      if (params.count > 1) {
        values[key] = jsonpathPlus.JSONPath(params.path, data).slice(0, params.count);
      } else {
        values[key] = jsonpathPlus.JSONPath(params.path, data);
      }
    }

    if (params.cycle || params.reverse) {
      return cycle(values[key], params.reverse);
    }

    return pick$1(values[key]);
  }

  Object.keys(obj).forEach(function (k) {
    obj[k] = resolve(obj[k], data, values, k);
  });
  return obj;

if (obj.jsonPath) {
    const params = typeof obj.jsonPath !== 'object'
      ? { path: obj.jsonPath }
      : obj.jsonPath;

    params.group = obj.group || params.group || property;
    params.cycle = obj.cycle || params.cycle || false;
    params.reverse = obj.reverse || params.reverse || false;
    params.count = obj.count || params.count || 1;

    const key = `${params.group}__${params.path}`;

    if (!values[key]) {
      if (params.count > 1) {
        values[key] = JSONPath(params.path, data).slice(0, params.count);
      } else {
        values[key] = JSONPath(params.path, data);
      }
    }

    if (params.cycle || params.reverse) {
      return cycle(values[key], params.reverse);
    }

    return pick(values[key]);
  }

  Object.keys(obj).forEach(k => {
    obj[k] = resolve(obj[k], data, values, k);
  });

export function findValuesByJsonPath(
  json: mixed,
  path: string,
  resultType: string = 'all',
) {
  const result = JSONPath({json, path, resultType});
  logger.debug(`For path '${path}' found ${result.length} items`);
  return result;
}