comment ForwardRef issue
@@ -38,6 +38,7 @@ export const FoldButtonGroup = (props: Props) => {
<IconButton aria-label="more" aria-controls="long-menu" aria-haspopup="true" onClick={handleClick}>
<MoreVertIcon />
</IconButton>
+ {/* ForwardRef ISSUE https://github.com/mui-org/material-ui/issues/15903 */}
<Menu
id="long-menu"
anchorEl={anchorEl}
