Pull out Map operations into helper functions in Dependency_info
Pull out Map operations into helper functions in Dependency_info

Reviewed By: gabelevi

Differential Revision: D18580787

fbshipit-source-id: 5c26ea86ec9532c5e90886f28b3518b4c2e1f961

facebook/flow,facebook/flow,mroch/flow,samwgoldman/flow,mroch/flow,facebook/flow,samwgoldman/flow,mroch/flow,samwgoldman/flow,samwgoldman/flow,mroch/flow,samwgoldman/flow,mroch/flow,facebook/flow,samwgoldman/flow,facebook/flow,mroch/flow,facebook/flow,facebook/flow,mroch/flow,samwgoldman/flow