A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, columns } from '@wordpress/icons';
<Icon icon={columns} />
<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false"><path d="M19 6H6c-1.1 0-2 .9-2 2v9c0 1.1.9 2 2 2h13c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2zm-4.1 1.5v10H10v-10h4.9zM5.5 17V8c0-.3.2-.5.5-.5h2.5v10H6c-.3 0-.5-.2-.5-.5zm14 0c0 .3-.2.5-.5.5h-2.6v-10H19c.3 0 .5.2.5.5v9z"></path></svg>
columns – WordPress Icon Library