Malleable_error.Result_accumulatorval sexp_of_t :
'a. ( 'a -> Ppx_sexp_conv_lib.Sexp.t ) ->
'a t ->
Ppx_sexp_conv_lib.Sexp.tval create : 'a -> Test_error.internal_error Error_accumulator.t -> 'b tval return : 'a -> 'b tval is_ok : 'a t -> bool