duration property
      
      num?
      get
      duration
      
    
    
    
Implementation
_i2.num? get duration => _i4.getProperty(
      this,
      'duration',
    );
      
      set
      duration
      (num? value) 
      
    
    
    
Implementation
set duration(_i2.num? value) {
  _i4.setProperty(
    this,
    'duration',
    value ?? _i6.undefined,
  );
}