toJson method Null safety

Implementation

Map<String, bool> toJson() {
  final hasEmpty = contains(ChannelQueryIncludeOption.emptyChannel);
  final hasMember = contains(ChannelQueryIncludeOption.memberList);
  final hasFrozen = contains(ChannelQueryIncludeOption.frozenChannel);
  final hasRead = contains(ChannelQueryIncludeOption.readReceipt);
  final hasDelivery = contains(ChannelQueryIncludeOption.deliveryReceipt);
  final hasMeta = contains(ChannelQueryIncludeOption.metaData);

  return {
    if (hasEmpty) 'show_empty': true,
    if (hasMember) 'show_member': true,
    if (hasFrozen) 'show_frozen': true,
    if (hasRead) 'show_read_receipt': true,
    if (hasDelivery) 'show_delivery_receipt': true,
    if (hasMeta) 'show_metadata': true,
  };
}