$maxResults
Max number of results to return limited to 1000 (default: 1000)
$firstResult
Start of next result set (default: 0)
$contactId
Contact to get history
$hydrator
getMaxResults()
setMaxResults( $maxResults)
getFirstResult()
setFirstResult( $firstResult)
getContactId()
setContactId( $contactId)
ns()
getQuery()
getHydrator()
setHydrator( $hydrator)