src/vs/platform/terminal/node/terminalProcess.ts/TerminalProcess/clearUnacknowledgedChars
class TerminalProcess:	clearUnacknowledgedChars(): void {
		this._unacknowledgedCharCount = 0;
		this._logService.trace(`Flow control: Cleared all unacknowledged chars, forcing resume`);
		if (this._isPtyPaused) {
			this._ptyProcess?.resume();
			this._isPtyPaused = false;
		}
	}