Function accept_with_buf_factory 

pub fn accept_with_buf_factory<F: BufFactory>(
    scid: &ConnectionId<'_>,
    odcid: Option<&ConnectionId<'_>>,
    local: SocketAddr,
    peer: SocketAddr,
    config: &mut Config,
) -> Result<Connection<F>>

Creates a server-side connection with custom buffer generation.

The buffers generated can be anything that can be dereferenced as a byte slice. See accept and BufFactory for more information.