func fieldNumberOf(T: type; fieldName: static string): int {.compileTime,
    ...raises: [], gcsafe.}

func isImplicit(T: type): bool {.compileTime, ...raises: [], gcsafe.}

func isImplicit(T: type; fieldName: static string): bool {.compileTime,
    ...raises: [], gcsafe.}

func isOneof(T: type; fieldName: static string): bool {.compileTime, ...raises: [],
    gcsafe.}

func isPacked(T: type; fieldName: static string): Option[bool] {.compileTime,
    ...raises: [], gcsafe.}

func isProto(T: type): bool {.compileTime, ...raises: [], gcsafe.}

func isProto2(T: type): bool {.compileTime, ...raises: [], gcsafe.}

func isProto3(T: type): bool {.compileTime, ...raises: [], gcsafe.}

func isRequired(T: type; fieldName: static string): bool {.compileTime,
    ...raises: [], gcsafe.}

func protoEdition(T: type): int {.compileTime, ...raises: [], gcsafe.}

func supportsPacked(T: type; ProtoType: type ProtobufExt): bool {....raises: [],
    gcsafe.}

func supportsPacked(T: type; ProtoType: type SomeProto): bool {....raises: [],
    gcsafe.}

func verifySerializable[T](ty: typedesc[T]) {.compileTime, ...raises: [], gcsafe.}

macro enumOneofFields(T: type; kName, kVal, fName, fTyp, body: untyped): untyped {..}

macro setOneof(fieldVar: var object; kName: static[string]; kVal: untyped;
               fName: static[string]; fVal: untyped): untyped {..}

template flatType(T: type Protobuf; value: auto): type {..}

template protoType(InnerType, RootType, FieldType: untyped; fieldName: untyped) {..}

template unsupportedProtoType(FieldType, RootType, fieldName: untyped): untyped {..}