Melange_ppx_lib.Ast_core_type_class_type
let handle_class_type_fields: Melange_compiler_libs.Ast_mapper.mapper => list(Melange_compiler_libs.Parsetree.class_type_field) => list(Melange_compiler_libs.Parsetree.class_type_field);
let typ_mapper: Melange_compiler_libs.Ast_mapper.mapper => Melange_compiler_libs.Parsetree.core_type => Melange_compiler_libs.Parsetree.core_type;