...
    const mp = try otel.MeterProvider.default();
    defer mp.shutdown();

    const meter = try mp.getMeter(.{ .name = "test-meter" });
    const counter = try meter.createUpDownCounter(i64, .{
        .name = "test_counter",
        .description = "A counter for testing purposes",
    });
    const val: []const u8 = "Hello, OpenTelemetry!";
    try counter.add(1, .{ "test_key", val });

    const histogram = try meter.createHistogram(i64, .{
        .name = "test_histogram",
        .description = "A histogram for testing purposes",
    });
    try histogram.record(42, .{ "test_key", val });
...

and then run `zig build --verbose` to see it in action.