Ast_config (melange.Ast

let add_structure: 
  string =>
  (option(Melange_compiler_libs.Parsetree.expression) => unit) =>
  unit;

let add_signature: 
  string =>
  (option(Melange_compiler_libs.Parsetree.expression) => unit) =>
  unit;

let iter_on_bs_config_stru: Melange_compiler_libs.Parsetree.structure => unit;

let iter_on_bs_config_sigi: Melange_compiler_libs.Parsetree.signature => unit;