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Create an Apex Class

1. Create an a global Apex class that implements the Callable Interface.

2. Implement the call method inside your class.

3. The call method is expected to return a B25__Reservation__c which will be the blueprint for the generated reservations.
   More details about this method can be found below in the section ‘Implementing the Call Method’.

4. Save your class and remember the name for the next section.

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