SipHangupEvent constructor Null safety

SipHangupEvent(
  1. {String? event,
  2. int? code,
  3. String? reason,
  4. String? reasonHeaderProtocol,
  5. String? reasonHeaderCause}
)

Implementation

SipHangupEvent(
    {this.event,
    this.code,
    this.reason,
    this.reasonHeaderProtocol,
    this.reasonHeaderCause});