src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/textureAtlas
class XtermTerminal:	get textureAtlas(): Promise<ImageBitmap> | undefined {
		const canvas = this._webglAddon?.textureAtlas || this._canvasAddon?.textureAtlas;
		if (!canvas) {
			return undefined;
		}
		return createImageBitmap(canvas);
	}