function a11y_figcaption_parent(node) {
	w(node, 'a11y_figcaption_parent', `\`<figcaption>\` must be an immediate child of \`<figure>\`\nhttps://svelte.dev/e/a11y_figcaption_parent`);
}
`<figcaption>` must be an immediate child of `<figure>`
@param {null | NodeLike} node