toJson method

Implementation

core.Map<core.String, core.dynamic> toJson() {
  final kind = this.kind;
  final periodEndMillis = this.periodEndMillis;
  final periodStartMillis = this.periodStartMillis;
  return {
    'kind': ?kind,
    'periodEndMillis': ?periodEndMillis,
    'periodStartMillis': ?periodStartMillis,
  };
}