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Why not just write `web::Json`? Is `Bytes` has better performance?

Sorry for the late reply, I just finished my project. So, I just created a new file to test again, I found that as long as I add a `set`...

And also 'extends'.

No.

Can use `{:#}` for now. ```rust use anyhow::anyhow; fn main() { let e = anyhow!("some errors").context("read failed"); println!("{}", e); println!("{:#}", e); println!("{:#?}", e); } ``` ```log read failed read failed:...