Function paramsEqual

http/unstable_structured_fields_test.ts:846–856

(
  a: ReadonlyMap<string, BareItem>,
  b: ReadonlyMap<string, BareItem>,
)

// Compare parameters for equality
function paramsEqual(
  a: ReadonlyMap<string, BareItem>,
  b: ReadonlyMap<string, BareItem>,
): boolean {
  if (a.size !== b.size) return false;
  for (const [key, val] of a) {
    const bVal = b.get(key);
    if (!bVal || !bareItemsEqual(val, bVal)) return false;
  }
  return true;
}

// Compare items for equality
function itemsEqual(a: Item, b: Item): boolean {