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This will create a feature request which anybody can view and comment on.

Please describe your requested enhancement. Good feature requests will solve common problems or enable new use cases.

What you would like to accomplish:

To update accordingly the functionality of the  "pinUnexpandedResults" parameter in the "QueryExpansionSpec" described in the public documentation:

https://cloud.google.com/retail/docs/reference/rest/v2/QueryExpansionSpec#:~:text=If%20this%20field%20is%20set%20to%20true%2C%20unexpanded%20products%20are%20always%20at%20the%20top%20of%20the%20search%20results