Firestore/src/V1/StructuredQuery/Filter.php
public function setUnaryFilter($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Firestore\V1\StructuredQuery_UnaryFilter::class);
        $this->writeOneof(3, $var);

        return $this;
    }
public function setUnaryFilter($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Firestore\V1\StructuredQuery_UnaryFilter::class);
        $this->writeOneof(3, $var);

        return $this;
    }
public function setUnaryFilter ( $ var ) { GPBUtil :: checkMessage ( $ var , \ Google \ Cloud \ Firestore \ V1 \ StructuredQuery_UnaryFilter :: class ) ; $ this -> writeOneof ( 3 , $ var ) ; return $ this ; }
A filter that takes exactly one argument.

Generated from protobuf field <code>.google.firestore.v1.StructuredQuery.UnaryFilter unary_filter = 3;</code>
@param \Google\Cloud\Firestore\V1\StructuredQuery\UnaryFilter $var
@return $this
A filter that takes exactly one argument .