syntax = "proto2";

package com.example.nanopb;

message TopLevelMessage {
    required uint32 base_field = 1;
    required NestedMessage nested = 2;
    optional ShortIfNone short_if_none = 3;
    optional ShortIfStripPackage short_if_strip_package = 4;
    optional ShortIfFlatten short_if_flatten = 5;

    message NestedMessage {
        required NestedLevel2 nested = 1;

        message NestedLevel2 {
            required NestedLevel3 nested = 1;

            message NestedLevel3 {
                required uint32 nothing = 1;
            }
        }
    }

    enum ShortIfNone {
        IfNone_A = 1;
        IfNone_B = 2;
    }

    enum ShortIfStripPackage {
        IfPackage_A = 1;
        IfPackage_B = 2;
    }

    enum ShortIfFlatten {
        IfFlatten_A = 1;
        IfFlatten_B = 2;
    }
}