toJson method

Implementation

core.Map<core.String, core.dynamic> toJson() {
  final beatsPerMinute = this.beatsPerMinute;
  final metadata = this.metadata;
  final sampleTime = this.sampleTime;
  return {
    'beatsPerMinute': ?beatsPerMinute,
    'metadata': ?metadata,
    'sampleTime': ?sampleTime,
  };
}