use std::cell::RefCell;use std::rc::Rc; use copypasta::ClipboardProvider; use crate::platform::PlatformWindow;use crate::{AnyWindowHandle, CursorStyle, DisplayId, PlatformDisplay, WindowOptions}; pub trait Client {    fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>>;    fn display(&self, id: DisplayId) -> Option<Rc<dyn PlatformDisplay>>;    fn open_window(        &self,        handle: AnyWindowHandle,        options: WindowOptions,    ) -> Box<dyn PlatformWindow>;    fn set_cursor_style(&self, style: CursorStyle);    fn get_clipboard(&self) -> Rc<RefCell<dyn ClipboardProvider>>;    fn get_primary(&self) -> Rc<RefCell<dyn ClipboardProvider>>;}