Jsont_typegist.Mem_mapCustom member map field metadata key.
If a field defines a value for this key, the value is used for the JSON member map of the field.
type ('a, 'b) t = ('a, 'b) Jsont.Object.Mem.mapSee Jsont.Object.Mem.map.
val ignore : string -> 'b -> ('a, 'b) tignore n v is Jsont.Object.Mem.map named n which always (de)serializes null with v.
val add :
('a, 'b) t ->
('a, 'b) Typegist__meta.t2 ->
('a, 'b) Typegist__meta.t2val find : ('a, 'b) Typegist__meta.t2 -> ('a, 'b) t option