val importInDatable :
  log_error:ImportErrors.t ->
  conf:ImporterSyntax.t ->
  dirname:string ->
  ImportAnalyser.Dependency.t ->
  _ ImportSQL.Db.t ->
  ImportDataTypes.Value.t array option Lwt.t
(** Load an excel spreadsheet in an SQLite database.

    Return the header if at least one row where present *)