Missed these two button constants.

Author: tapashmajumder

swift-sdk/ITBConsts.swift

@@ -123,6 +123,7 @@ public extension AnyHashable {
     public static let ITBL_BUTTON_REQUIRES_UNLOCK = "requiresUnlock"
     public static let ITBL_BUTTON_INPUT_TITLE = "inputTitle"
     public static let ITBL_BUTTON_INPUT_PLACEHOLDER = "inputPlaceholder"
+    public static let ITBL_BUTTON_ACTION = "action"
 }
 
 @objcMembers public class ITBConsts : NSObject {

swift-sdk/Internal/IterableAppIntegrationInternal.swift

@@ -228,13 +228,13 @@ struct IterableAppIntegrationInternal {
             return nil
         }
         let foundButton = buttons.first { (button) -> Bool in
-            guard let buttonIdentifier = button[ITBL_BUTTON_IDENTIFIER] as? String else {
+            guard let buttonIdentifier = button[.ITBL_BUTTON_IDENTIFIER] as? String else {
                 return false
             }
             return buttonIdentifier == actionIdentifier
         }
 
-        return foundButton?[ITBL_BUTTON_ACTION] as? [AnyHashable : Any]
+        return foundButton?[.ITBL_BUTTON_ACTION] as? [AnyHashable : Any]
     }
 
     @available(iOS 10.0, *)