test2.proto

message TestHDF5Message
{
    repeated double a = 1;
    repeated B b = 2;
}

message B
{
    repeated double c = 2;
    repeated double d = 3;
    repeated int32 e = 4;
    repeated F f = 5;
}

message F
{
    repeated double g = 1;
    optional int32 h = 2;
}