Correct function return statement.

[sanganinamrata]

The return statement should say $this instead of this.

Fixed Issues (if relevant)

N/A

Manual testing scenarios

N/A

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• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

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[sidolov]

Hi @namratachangani , please, sign CLA, otherwise, we can't process your pull request

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