Deleting Entities
To delete a single entity in the default context:
[myPerson MR_deleteEntity];
To delete the entity from a specific context:
[myPerson MR_deleteEntityInContext:otherContext];
To truncate all entities from the default context:
[Person MR_truncateAll];
To truncate all entities in a specific context:
[Person MR_truncateAllInContext:otherContext];