$_must
$_must : array
Must.
Bool Filter.
This class is for backward compatibility reason for all php < 7 versions. For PHP 7 and above use BoolFilter as Bool is reserved.
addShould(array|\Elastica\Filter\AbstractFilter  $args) : $this
                Adds should filter.
| array|\Elastica\Filter\AbstractFilter | $args | Filter data | 
addMust(array|\Elastica\Filter\AbstractFilter  $args) : $this
                Adds must filter.
| array|\Elastica\Filter\AbstractFilter | $args | Filter data | 
addMustNot(array|\Elastica\Filter\AbstractFilter  $args) : $this
                Adds mustNot filter.
| array|\Elastica\Filter\AbstractFilter | $args | Filter data | 
_addFilter(string $type, array|\Elastica\Filter\AbstractFilter $args) : $this
Adds general filter based on type.
| string | $type | Filter type | 
| array|\Elastica\Filter\AbstractFilter | $args | Filter data |