PXP Reference : Pxp_ev_parser

`sig
val create_entity_manager :
?is_document:bool ->
Pxp_types.config -> Pxp_types.source -> Pxp_entity_manager.entity_manager
val process_entity :
Pxp_types.config ->
Pxp_types.entry ->
Pxp_entity_manager.entity_manager -> (Pxp_types.event -> unit) -> unit
val process_expr :
?first_token:Pxp_lexer_types.token ->
?following_token:Pxp_lexer_types.token Pervasives.ref ->
Pxp_types.config ->
Pxp_entity_manager.entity_manager -> (Pxp_types.event -> unit) -> unit
val close_entities : Pxp_entity_manager.entity_manager -> unit
val create_pull_parser :
Pxp_types.config ->
Pxp_types.entry ->
Pxp_entity_manager.entity_manager -> unit -> Pxp_types.event option
end`