src/vs/workbench/contrib/codeEditor/browser/untitledTextEditorHint/untitledTextEditorHint.ts/UntitledTextEditorHintContentWidget/onDidChangeModelContent
class UntitledTextEditorHintContentWidget:	private onDidChangeModelContent(): void {
		if (this.editor.getValue() === '') {
			this.editor.addContentWidget(this);
		} else {
			this.editor.removeContentWidget(this);
		}
	}