Function serializeParameters

http/unstable_structured_fields.ts:1401–1416

(parameters: Parameters)

}

function serializeParameters(parameters: Parameters): string {
  let result = "";

  for (const [key, value] of parameters) {
    validateKey(key);
    result += ";";
    result += key;

    if (value.type !== "boolean" || value.value !== true) {
      result += "=";
      result += serializeBareItem(value);
    }
  }

  return result;
}

function validateKey(key: string): void {
  if (key.length === 0) {