proc epochNanoNow(): uint64 {....raises: [CatchableError, ValueError],
                              tags: [ReadEnvEffect, RootEffect], forbids: [].}

proc epochSecNow(): int {....raises: [CatchableError, ValueError],
                          tags: [ReadEnvEffect, RootEffect], forbids: [].}

proc nanoEpochToStr(time: uint64; precision = 3): string {....raises: [], tags: [],
    forbids: [].}

template time(action: string; code: untyped)

template time_as(timevar: untyped; code: untyped)