const childrenFilter = computed(() => {
  if (!selectedParents.value.length) {
    return [];
  }
  return [{
    kind: 'group',
    op: 'AND',
    filter: selectedParents.value.map(selectedParent => ({
      // This inner OR group shouldn't be needed, but there is a bug in how
      // multiple conditions against the same field are handled in Drupal Core
      // https://www.drupal.org/project/drupal/issues/3066202#comment-13181270
      kind: 'group',
      op: 'OR',
      filter: [{
        kind: 'attribute',
        attribute: 'parent.id',
        op: '=',
        value: selectedParent.id
      }]
    }))
  }];
});