type t = {
  filters : ImportDataTypes.Path.t ImportExpression.T.t list;
  group : ImportDataTypes.Path.t ImportExpression.T.t option;
}
(** Represent a filter to apply in the querry

    The CTE can have filters applied on the previous CTE (or directly in the
    sources if there is any yet) and can hold a group (an only one).

    If there is a group, it must be applied after the others filters.

    The order in which the filters are presented in the configuration can change
    the results ; it does not matter when we only have classicals filters,
    because all cf them can be evaluated at the same time, but as soon we have a
    group function, the result become dependant of the previous ones. *)

val of_filters : ImportDataTypes.Path.t ImportExpression.T.t list -> t list