CameraPurposeEnumSet.all constructor
      
      CameraPurposeEnumSet.all()
     
    
    
Implementation
factory CameraPurposeEnumSet.all() {
  CameraPurposeEnumSet enumSet = CameraPurposeEnumSet();
  enumSet.addAll(CameraPurpose.values);
  return enumSet;
}