anchor.diff:  
     /**
     * https://sendgrid.api-docs.io/v3.0/campaigns-api/retrieve-all-campaigns
  +  * Retrieve a list of all of your campaigns.
     */
     public struct function listCampaigns() {
       return apiCall( 'GET', "/campaigns" );
  
positive.code:   */
  
    /**
    * @hint Allows you to create a marketing campaign.
    * @campaign this should be an instance of the helpers.campaign component. However, if you want to create the object and pass in the struct or json yourself, you can.
    */
    public struct function createCampaign( required any campaign ) {
      var body = {};
  
negative.code: 
    /**
    * @hint Send email, using SendGrid's REST API
    * @mail must be an instance of the `helpers.mail` component
    */
    public struct function sendMail( required component mail ) {
      if ( variables.forceTestMode ) mail.enableSandboxMode();
  