Header constructor Null safety

Header(
  1. {AppSequence? appSequence,
  2. dynamic xmlMessageID,
  3. dynamic xmlRelatesTo,
  4. dynamic xmlTo,
  5. dynamic xmlAction}
)

Implementation

Header(
    {this.appSequence,
    this.xmlMessageID,
    this.xmlRelatesTo,
    this.xmlTo,
    this.xmlAction});