src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts/XtermTerminal/clearBuffer
class XtermTerminal:	clearBuffer(): void {
		this.raw.clear();
		// hack so that the next placeholder shows
		this._decorationAddon?.registerCommandDecoration({ marker: this.raw.registerMarker(0), hasOutput: false, timestamp: Date.now(), getOutput: () => { return undefined; }, command: '' }, true);
	}