#[cfg(feature="http")]
  let http=Arc::new( epi_http::EpiHttp{} );
  // some initialization code  here
  loop{
    let frame = FrameBuilder{
    info: IntegrationInfo,
    tex_allocator: &mut tex_allocator,
    repaint_signal: repaint_signal.clone(),
    output: &mut app_output,
    #[cfg(feature="http")]
    http: http.clone(),
    }
  }