Error : value into is not a member of Int

getting error : value into is not a member of Int

while designing the scenario for 30 users with 5 users every 10 seconds,

setUp(scn0.inject((30) into(rampUsers(5) during (1 seconds)) separatedBy(10 seconds)).protocols(httpProtocol))

anyone encountered the same?

Error:

value into is not a member of Int
setUp(scn0.inject((30) into(rampUsers(5) during (1 seconds)) separatedBy(10 seconds)).protocols(httpProtocol))
^