Firestore/src/V1/StructuredQuery/UnaryFilter.php
public function setOp($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Firestore\V1\StructuredQuery_UnaryFilter_Operator::class);
        $this->op = $var;

        return $this;
    }
public function setOp($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Firestore\V1\StructuredQuery_UnaryFilter_Operator::class);
        $this->op = $var;

        return $this;
    }
public function setOp ( $ var ) { GPBUtil :: checkEnum ( $ var , \ Google \ Cloud \ Firestore \ V1 \ StructuredQuery_UnaryFilter_Operator :: class ) ; $ this -> op = $ var ; return $ this ; }
The unary operator to apply.

Generated from protobuf field <code>.google.firestore.v1.StructuredQuery.UnaryFilter.Operator op = 1;</code>
@param int $var
@return $this
The unary operator to apply .