setContent method Null safety

TransactionBuilder setContent(
  1. dynamic content
)

Implementation

TransactionBuilder setContent(content) {
  if (!(content is Uint8List) && !(content is String)) {
    throw "'content' must be a string or Uint8List";
  }

  if (content is String) {
    content = Uint8List.fromList(utf8.encode(content));
  }
  data!.content = content;
  return this;
}