let mut display = MockDisplay :: < Rgb888 > :: new ( ) ; let backend = EmbeddedBackend :: new ( & mut display , EmbeddedBackendConfig :: default ( ) ) ; let mut terminal = Terminal :: new ( backend ) ? Default :: default ( ) } ; let backend = EmbeddedBackend :: new ( & mut display , config ) ; let _terminal = Terminal :: new ( backend ) ? Default :: default ( ) } ; let backend = EmbeddedBackend :: new ( & mut display , config ) ; let _terminal = Terminal :: new ( backend ) ? // let (mut spi_device, busy, dc, rst, mut delay) = ...; let mut epd = Epd2in9 :: new ( & mut spi_device , busy , dc , rst , & mut delay , None ) ? Default :: default ( ) } ; let backend = EmbeddedBackend :: new ( & mut display , config ) ; let _terminal = Terminal :: new ( backend ) ?