A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, justifyStretch } from '@wordpress/icons';
<Icon icon={justifyStretch} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M4 4H5.5V20H4V4ZM7 10L17 10V14L7 14V10ZM20 4H18.5V20H20V4Z"></path></svg>
justifyStretch – WordPress Icon Library