Compatibility with PHP 7.2.9

I am thinking of upgrading to PHP 7.2.9. I ran PHP Compatibility Checker. Scan results for Max Mega Menu Pro:

“FILE: /home4/ncbaroqu/public_html/wp-content/plugins/megamenu-pro/replacements/replacements.php
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FOUND 1 ERROR AFFECTING 1 LINE
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326 | ERROR | Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order since PHP 7.0. Use curly braces to remove ambiguity.”

This is all Greek (Geek…lol!) to me. What should I do before upgrading to PHP 7.2.9?

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