How to use the @wordpress/dom.focus.focusable function in @wordpress/dom

getClosestTabbable( target, isReverse ) {
		// Since the current focus target is not guaranteed to be a text field,
		// find all focusables. Tabbability is considered later.
		let focusableNodes = focus.focusable.find( this.container );

		if ( isReverse ) {
			focusableNodes = reverse( focusableNodes );
		}

		// Consider as candidates those focusables after the current target.
		// It's assumed this can only be reached if the target is focusable
		// (on its keydown event), so no need to verify it exists in the set.
		focusableNodes = focusableNodes.slice( focusableNodes.indexOf( target ) + 1 );

		function isTabCandidate( node, i, array ) {
			// Not a candidate if the node is not tabbable.
			if ( ! focus.tabbable.isTabbableIndex( node ) ) {
				return false;
			}

disable() {
		focus.focusable.find( this.node ).forEach( ( focusable ) => {
			if ( includes( DISABLED_ELIGIBLE_NODE_NAMES, focusable.nodeName ) ) {
				focusable.setAttribute( 'disabled', '' );
			}

			if ( focusable.hasAttribute( 'tabindex' ) ) {
				focusable.removeAttribute( 'tabindex' );
			}

			if ( focusable.hasAttribute( 'contenteditable' ) ) {
				focusable.setAttribute( 'contenteditable', 'false' );
			}
		} );
	}

getFocusableContext( target ) {
		const { onlyBrowserTabstops } = this.props;
		const finder = onlyBrowserTabstops ? focus.tabbable : focus.focusable;
		const focusables = finder.find( this.container );

		const index = this.getFocusableIndex( focusables, target );
		if ( index > -1 && target ) {
			return { index, target, focusables };
		}
		return null;
	}

function getRowFocusables( rowElement ) {
	const focusablesInRow = focus.focusable.find( rowElement );

	if ( ! focusablesInRow || ! focusablesInRow.length ) {
		return;
	}

	return focusablesInRow.filter( ( focusable ) => {
		return focusable.closest( '[role="treeitem"]' ) === rowElement;
	} );
}