Use template interpolation to stringify keys #26
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`toString()` always evaluates to `"[object Undefined]"`, so the current approach ends up storing all connections under the same key, leaking the ones that are overwritten. This converts to using template interpolation instead.
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toString()always evaluates to"[object Undefined]", so the current approach ends up storing all connections under the same key, leaking the ones that are overwritten. This converts to using template interpolation instead.