enum EntryType {
    first_type = 0;
    second_type= 1;
}

message EntryOne {
    string value = 1;
    uint32 index = 2;
}
message EntryTwo {
    uint32 value = 1;
    uint32 index = 2;
}

message SingleEntry{
    EntryType type = 1;
    oneof entry {
        EntryOne = 2;
        EntryTwo = 3;
    }

}

message CompactEntry {
    repeated SingleEntry = 1;
}

message SparseEntry {
    repeated EntryOne first_type_entries = 1;
    repeated EntryTwo second_type_entries = 1;
}