proc asyncImpl(defsign, body: NimNode; parser: var PySyntaxProcesser;
               procType = nnkProcDef): NimNode

proc defAux(signature, body: NimNode; deftype = ident"untyped";
            parser: var PySyntaxProcesser; procType = nnkTemplateDef;
            pragmas = emptyn): NimNode

proc defImpl(signature, body: NimNode; parser: var PySyntaxProcesser;
             pragmas = emptyn; deftype = ident"auto"; procType = nnkProcDef): NimNode

proc parseSignatureMayGenerics(parser: var PySyntaxProcesser;
                               generics: var NimNode; signature: NimNode;
                               deftype = ident"untyped"): tuple[name: NimNode,
    params: seq[NimNode]]