PHP 7.2 compatibility issue.

phpcs --standard=PHPCompatibility --runtime-set testVersion 7.2 docroot/sites/all/modules/contrib/knowledge_graph

FILE: ...dge_graph/includes/Controller/KnowledgeGraphEntityController.php
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FOUND 2 ERRORS AFFECTING 2 LINES
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217 | 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.
220 | 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.
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Time: 994ms; Memory: 12Mb