src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/_getCanvasAddonConstructor
class XtermTerminal:	protected async _getCanvasAddonConstructor(): Promise<typeof CanvasAddonType> {
		if (!CanvasAddon) {
			CanvasAddon = (await import('xterm-addon-canvas')).CanvasAddon;
		}
		return CanvasAddon;
	}