Spurious error highlighting "Expected 0 arguments found 1"

    unsafe {
        USB_SERIAL = Some(SerialPort::new(&bus_allocator));
        USB_BUS = Some(
            UsbDeviceBuilder::new(&bus_allocator, UsbVidPid(0x16c0, 0x27dd))
                .manufacturer("Fake company")
                .product("Serial port")
                .serial_number("TEST")
                .device_class(USB_CLASS_CDC)
                .build(),
        );
    }

Start by reproducing the provided USB initialization snippet in rust-analyzer and tracing the source of the “Expected 0 arguments found 1” diagnostic. Confirm why this valid call is highlighted and identify the relevant diagnostics or inference tests before defining completion as removal of the spurious error with a focused regression check.