Function itemsEqual

http/unstable_structured_fields_test.ts:859–862

(a: Item, b: Item)

// Compare items for equality
function itemsEqual(a: Item, b: Item): boolean {
  return bareItemsEqual(a.value, b.value) &&
    paramsEqual(a.parameters, b.parameters);
}

// Compare inner lists for equality
function innerListsEqual(a: InnerList, b: InnerList): boolean {