src/vs/editor/browser/controller/textAreaInput.ts/TextAreaInput/writeScreenReaderContent
class TextAreaInput:	public writeScreenReaderContent(reason: string): void {
		if (this._currentComposition) {
			// Do not write to the text area when doing composition
			return;
		}

		this._setAndWriteTextAreaState(reason, this._host.getScreenReaderContent());
	}