Fixes nameerror on prod
Fixes nameerror on prod

Summary: https://app.getsentry.com/inbox/prod/group/38940736/ -- I mistakenly removed an import while refactoring this part of the code.

Test Plan: That's an import.

Reviewers: emfree

Reviewed By: emfree

Differential Revision: https://review.inboxapp.com/D680

ErinCall/sync-engine,gale320/sync-engine,jobscore/sync-engine,wakermahmud/sync-engine,ErinCall/sync-engine,gale320/sync-engine,Eagles2F/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine,wakermahmud/sync-engine,Eagles2F/sync-engine,wakermahmud/sync-engine,wakermahmud/sync-engine,jobscore/sync-engine,PriviPK/privipk-sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine,PriviPK/privipk-sync-engine,PriviPK/privipk-sync-engine,nylas/sync-engine,jobscore/sync-engine,nylas/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,PriviPK/privipk-sync-engine,gale320/sync-engine,EthanBlackburn/sync-engine,wakermahmud/sync-engine,ErinCall/sync-engine,PriviPK/privipk-sync-engine,closeio/nylas,jobscore/sync-engine,closeio/nylas,closeio/nylas,EthanBlackburn/sync-engine,closeio/nylas,gale320/sync-engine,gale320/sync-engine,nylas/sync-engine,EthanBlackburn/sync-engine