Use PHPCSUtils MessageHelper::addMessage

This is more tested than the WPCS Sniff::addMessage().

Author: GaryJones

WordPressVIPMinimum/Sniffs/AbstractVariableRestrictionsSniff.php

@@ -9,7 +9,7 @@
 
 namespace WordPressVIPMinimum\Sniffs;
 
-use WordPressVIPMinimum\Sniffs\Sniff;
+use PHPCSUtils\Utils\MessageHelper;
 
 /**
  * Restricts usage of some variables.
@@ -200,11 +200,13 @@ public function process_token( $stackPtr ) {
 				continue;
 			}
 
-			$this->addMessage(
+			$code = MessageHelper::stringToErrorcode( $groupName . '_' . $match[1] );
+			MessageHelper::addMessage(
+				$this->phpcsFile,
 				$group['message'],
 				$stackPtr,
 				$group['type'] === 'error',
-				$this->string_to_errorcode( $groupName . '_' . $match[1] ),
+				$code,
 				[ $var ]
 			);