proc main(cmdLineParams: CommandLineParams): LanguageServer {....raises: [OSError,
    IOError, ResourceExhaustedError, JsonRpcError, CatchableError], tags: [
    WriteIOEffect, ReadEnvEffect, ReadIOEffect, WriteDirEffect, ReadDirEffect,
    RootEffect], forbids: [].}

proc tickLs(ls: LanguageServer; time = 1.seconds): Future[void] {.
    ...stackTrace: false, raises: [], gcsafe, tags: [RootEffect], forbids: [].}