public Collection<com.atlassian.bonnie.Searchable> pop()
Converts up to numberToPop handles of the same class into objects. These handles will be removed from the original collection.
It will only look maxLookAhead items further into the queue as soon as an object of different class is found.
up to numberToPop objects of the same class at a time. Returns empty list if there are no further objects in the queue.
org.springframework.dao.DataAccessException - if there was a problem contacting the database