fn fmt()

in src/trace/span.rs [107:117]


    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.debug_struct("Span")
            .field(
                "data",
                match self.obj {
                    Some(ref obj) => obj,
                    None => &"<none>",
                },
            )
            .finish()
    }