`Send` is not implemented for `dyn FnMut(binance::ws_model::WebsocketEvent) -> Result<(), binance::errors::Error>` about binance-rs-async HOT 10 CLOSED

That is because your FnMut is not Send

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If I add the constraint on the library :

`NonNull<pq_sys::pg_conn>` cannot be shared between threads safely
`Cell<i32>` cannot be shared between threads safely
`RefCell<HashMap<StatementCacheKey<Pg>, pg::connection::stmt::Statement>>` cannot be shared between threads safely

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I could add better tooling on that module to make it easier to split between sync and async, but that wouldn't solve your problem.

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@Igosuki Actually my issue has been resolved with #23, ported https://github.com/joelchen/teleporter was just to reproduce the issue, my other project is not using pq_sys::pg_conn.

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Actually I'm wondering if I shouldn't just add the auto trait constraint somehow in the code because you are the second person to get hit by this.

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I'm interested in what you want to do with that ticker data, I'm personally building trading tools these days.

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@Igosuki The ticker data is written to file instead of database, and thereafter being analyzed.

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I agree that the Fn must be Send so I merged and added better examples

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@joelchen I know that you are doing that, I actually use this library to write orderbooks to parquet files in a similar fashion.
I'm just wondering what you'll do with the data, machine learning ?

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Well, my email is on my profile if you wanna talk about your project.

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