Unwrapping of TypedParameterValue, return null instead of empty strin…#2655

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yura2201 wants to merge 1 commit intospring-projects:2.7.xfrom

yura2201:fix-2653

Commits on Oct 3, 2022

Unwrapping of TypedParameterValue, return null instead of empty string for string params.
yura2201
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