AbstractCurlBackend

Close the backend, releasing any resources (such as thread or connection pools) that have been allocated when opening or using the backend.

Send the given request. Should only be used when implementing new backends, or backend wrappers. Client code should instead use the send methods on the request type, e.g. Request.send.

A monad instance for the F effect type. Allows writing wrapper backends, which map/`flatMap`` over the return value of send.