code: function(eventTags) {
      if (typeof eventTags === 'object' && !Array.isArray(eventTags) && eventTags !== null) {
        return true;
      } else {
        throw new Error(sprintf(ERROR_MESSAGES.INVALID_EVENT_TAGS, MODULE_NAME));
      }
    }
docs: Validates user's provided event tags
  @param  {Object}  event tags
  @return {boolean} True if event tags are valid
  @throws If event tags are not valid