mk_implicit: (bool -> 'alias) ->
description_of_alias:('alias -> string) ->
mk_choice:('alias -> NCic.term DisambiguateTypes.codomain_item) ->
mk_implicit: (bool -> 'alias) ->
description_of_alias:('alias -> string) ->
mk_choice:('alias -> NCic.term DisambiguateTypes.codomain_item) ->