REST-Framework-Version header in Groovy

Summary

I am trying to call REST API of activities and giving QUERY string with AND, OR parameters

Content

I am trying to call REST API of activities and giving QUERY string with AND, OR parameters. When I test in POSTMAN, as part of header REST-Framework-Version variable need to be set to call API. But while calling the same API from groovy script, 

1. Do I need to specify explicitly REST-Framework-Version in Groovy?

2. If yes, how can I specify that in Groovy?

Note: I tried to call API with AND, OR parameter same like normal call in Groovy. But ServiceInvocationException error.