Update L.UnlockAction method creation to ES6 syntax

[TejaSwaroopArukoti]

Fixes #613(<=== Add issue number here)

@sashadev-sky please review my PR.

Thanks, interested to change for other files too.

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[sashadev-sky]

@TejaSwaroopArukoti thank you so much, great work! We are good to merge here. :)

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