def to_sint64
import bend-kit-protobuf@0.2.0.0/protobuf.bend as Protobufimport Base
614def to_sint64(v: Value) -> Result<&2, &2, Error, Word64>:
615 do Result<&2, &2, Error, Word64>:
616 bits : Word64 <- to_uint64(v)
617 return Word64.unzigzag(bits)