in packages/search-ui/src/helpers.ts [125:134]
export function mergeFilters(filters1, filters2) {
if (!filters2) return filters1;
return filters2.reduce((acc, next) => {
if (acc.find((f) => f.type === next.type && f.field === next.field)) {
return acc;
}
return [...acc, next];
}, filters1);
}