_fetchDataFromValuesWithOptions ({ dataFromWithOptions, specOptions }) {
    return Promise.all(dataFromWithOptions.map(async dataItem => {
      const { key, ...keyOptions } = dataItem
      const value = await this._get({ key, specOptions, keyOptions })

      try {
        return JSON.parse(value)
      } catch (err) {
        this._logger.warn(`Failed to JSON.parse value for '${dataItem}',` +
          ' please verify that your secret value is correctly formatted as JSON.')
      }
    }))
  }
Fetch Kubernetes secret property values with options.
@param {Object[]} dataFromWithOptions - Array of secret keys in the backend, including extra options
@param {string} specOptions - Options set on spec level that might be interesting for the backend
@returns {Promise} Promise object representing secret property values.