How to use the dom-lib.isOverflowing function in dom-lib

let data = {
            modals: [modal],
            //right now only the first modal of a container will have its classes applied
            classes: className ? className.split(/\s+/) : [],
            //we are only interested in the actual `style` here becasue we will override it
            style: {
                overflow: container.style.overflow,
                paddingRight: container.style.paddingRight
            }
        };

        let style = {
            overflow: 'hidden'
        };

        data.overflowing = isOverflowing(container);

        if (data.overflowing) {
            // use computed style, here to get the real padding
            // to add our scrollbar width
            style.paddingRight = parseInt(addStyle(container, 'paddingRight') || 0, 10) + getScrollbarSize() + 'px';
        }

        addStyle(container, style);

        data.classes.forEach(addClass.bind(null, container));

        this.containers.push(container);
        this.data.push(data);

        return modalIdx;
    }

getStyles(dialogElement?: HTMLElement) {
    const { container, overflow, drawer } = this.props;
    const node: any = dialogElement || this.dialogRef.current;
    const doc: any = ownerDocument(node);
    const scrollHeight = node ? node.scrollHeight : 0;

    const bodyIsOverflowing = isOverflowing(container || doc.body);
    const modalIsOverflowing = scrollHeight > doc.documentElement.clientHeight;

    const styles: {
      modalStyles: React.CSSProperties;
      bodyStyles: React.CSSProperties;
    } = {
      modalStyles: {
        [isRTL() ? 'paddingLeft' : 'paddingRight']:
          bodyIsOverflowing && !modalIsOverflowing ? getScrollbarSize() : 0,
        [isRTL() ? 'paddingRight' : 'paddingLeft']:
          !bodyIsOverflowing && modalIsOverflowing ? getScrollbarSize() : 0
      },
      bodyStyles: {}
    };

    if (!overflow) {