src/vs/editor/contrib/hover/browser/contentHover.ts/EditorDecorationsChangerListener/deltaDecorations
class EditorDecorationsChangerListener:	public deltaDecorations(oldDecorations: string[], newDecorations: IModelDeltaDecoration[]): string[] {
		try {
			this._isChangingDecorations = true;
			return this._editor.deltaDecorations(oldDecorations, newDecorations);
		} finally {
			this._isChangingDecorations = false;
		}
	}