Protobuf objects can't have arbitrary fields addedd and we need to later on
    add comments to them, so we instead make "Editable" objects that can do so

def convert_protodef_to_editable(proto):
    """
    Protobuf objects can't have arbitrary fields addedd and we need to later on
    add comments to them, so we instead make "Editable" objects that can do so
    """
    class Editable(object):
        def __init__(self, prot):
            self.kind = type(prot)
            self.name = prot.name
            self.comment = ""
            self.options = dict([(key.name, value) for (key, value) in prot.options.ListFields()])
            if isinstance(prot, EnumDescriptorProto):
                self.value = [convert_protodef_to_editable(x) for x in prot.value]
            elif isinstance(prot, DescriptorProto):
                self.field = [convert_protodef_to_editable(x) for x in prot.field]
                self.enum_type = [convert_protodef_to_editable(x) for x in prot.enum_type]
                self.nested_type = prot.nested_type
                self.oneof_decl = prot.oneof_decl
            elif isinstance(prot, EnumValueDescriptorProto):
                self.number = prot.number
            elif isinstance(prot, FieldDescriptorProto):
                if prot.type in [11, 14]:
                    self.ref_type = prot.type_name[1:]
                self.type = prot.type
                self.label = prot.label
            elif isinstance(prot, ServiceDescriptorProto):
                self.method = [convert_protodef_to_editable(x) for x in prot.method]
            elif isinstance(prot, MethodDescriptorProto):
                self.input_type = prot.input_type
                self.output_type = prot.output_type
            else:
                raise Exception, type(prot)

    return Editable(proto)