Bridging.md reference to crate::Result ?

[JiveyGuy]

What is meant by the crate::Result?

pub fn set(&mut self, key: &str, value: Bytes) -> crate::Result<()> {
        self.rt.block_on(self.inner.set(key, value))
    }

[JiveyGuy]

I see now in the Bridging tutorial there are references to previous tutorials where this is defined.