may help you . Finally get rid of the issue acknowledged it was due to older version of Google maps iOS SDK. I had been fetching Google SDK without specifying any version number in podfile it gave me like 1.10 version. Hence I updated Google SDK pods with version 1.12.3 then I have the "country" field in GMSAutocompleteFilter class.
"Use of unresolved identifier" error, yet I have the identifier declared in a framework