addHeader method Null safety

void addHeader(
  1. String name,
  2. String value,
  3. {HeaderEncoding encoding = HeaderEncoding.none}

Adds a header with the specified name and value.

Compare MailConventions for common header names. Set encoding to any of the HeaderEncoding formats to encode the header.


void addHeader(String name, String value,
    {HeaderEncoding encoding = HeaderEncoding.none}) {
  _part.addHeader(name, value, encoding);