MC-1439: Define API & SPI and mark accordingly

Author: irenelagno

app/code/Magento/PageBuilder/Block/Adminhtml/ContentType/Edit/CancelButton.php

@@ -12,6 +12,7 @@
 
 /**
  * Cancel button on edit panel for Content Type
+ *
  * @api
  */
 class CancelButton implements ButtonProviderInterface

app/code/Magento/PageBuilder/Block/Adminhtml/ContentType/Edit/CloseButton.php

@@ -11,6 +11,7 @@
 
 /**
  * Close button on edit panel for Content Type
+ *
  * @api
  */
 class CloseButton implements ButtonProviderInterface

app/code/Magento/PageBuilder/Block/Adminhtml/ContentType/Edit/ResetButton.php

@@ -11,6 +11,7 @@
 
 /**
  * Reset button on edit panel for Content Type
+ *
  * @api
  */
 class ResetButton implements ButtonProviderInterface

app/code/Magento/PageBuilder/Block/Adminhtml/ContentType/Edit/SaveButton.php

@@ -11,6 +11,7 @@
 
 /**
  * Save button on edit panel for Content Type
+ *
  * @api
  */
 class SaveButton implements ButtonProviderInterface

app/code/Magento/PageBuilder/Block/Adminhtml/Form/Element/ProductConditions.php

@@ -12,6 +12,7 @@
 
 /**
  * The block used to render the conditions rule tree form within the PageBuilder interface.
+ *
  * @api
  */
 class ProductConditions extends Template

app/code/Magento/PageBuilder/Block/Adminhtml/System/Config/EnableField.php

@@ -11,6 +11,7 @@
 
 /**
  * Class EnableField renders modal window if disable PB in System Configuration
+ *
  * @api
  */
 class EnableField extends \Magento\Config\Block\System\Config\Form\Field

app/code/Magento/PageBuilder/Block/Adminhtml/System/Config/SwitchAttributeType.php

@@ -10,6 +10,7 @@
 
 /**
  * Class SwitchAttributeType renders modal window to confirm changing attribute type
+ *
  * @api
  */
 class SwitchAttributeType extends \Magento\Config\Block\System\Config\Form\Field

app/code/Magento/PageBuilder/Block/Element/Editor.php

@@ -9,6 +9,7 @@
 
 /**
  * Class Editor add logic to render PB instead of wysiwyg editor
+ *
  * @api
  */
 class Editor extends \Magento\Framework\Data\Form\Element\Editor

app/code/Magento/PageBuilder/Block/WidgetInitializer.php

@@ -12,6 +12,7 @@
 
 /**
  * Class WidgetInitializer provides configuration for content types widgets need to be loaded on frontend
+ *
  * @api
  */
 class WidgetInitializer extends Template

app/code/Magento/PageBuilder/Component/Form/Element/Wysiwyg.php

@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\PageBuilder\Component\Form\Element;
 
 use Magento\Framework\Data\FormFactory;
@@ -13,6 +15,11 @@
 use Magento\PageBuilder\Model\State as PageBuilderState;
 use \Magento\PageBuilder\Model\Stage\Config as Config;
 
+/**
+ * Updates wysiwyg element with Page Builder specific config
+ *
+ * @api
+ */
 class Wysiwyg extends \Magento\Ui\Component\Form\Element\Wysiwyg
 {
     /**