SzczepanCielik[m: > <@beregond:matrix.org> Ok, last existential newbie question for today
> ```
> let spi = Spi::new(
>         peripherals.SPI2,
>         sclk,
>         mosi,
>         miso,
>         cs,
>         3_000_000u32.Hz(),
>         SpiMode::Mode0,
>         &clocks,
>     );
> 
>     let mut ws = Ws2812::new(spi);
> ```
> 
> and in general it works, but I want to put this `ws` to function - how to figure out its **signature**? I just cant find anything that works

usually you can write `let mut ws: () = Ws2812::new(spi);`, and the compiler will give you an error like "expected `()`, found `Spi<.....>`"