$_params
$_params : array
Params.
Not Filter.
This function can be used to handle params for queries, filter
__construct(\Elastica\Filter\AbstractFilter  $filter) 
                Creates Not filter query.
| \Elastica\Filter\AbstractFilter | $filter | Filter object | 
setFilter(\Elastica\Filter\AbstractFilter  $filter) : $this
                Set filter.
| \Elastica\Filter\AbstractFilter | $filter |