src/Builder/Syntax/WhereWriter.php
protected function writeExistence(Where $where, $method, $operation)
    {
        $exists = [];

        foreach ($where->$method() as $select) {
            $exists[] = "$operation (".$this->writer->write($select, false).')';
        }

        return $exists;
    }
protected function writeExistence(Where $where, $method, $operation)
    {
        $exists = [];

        foreach ($where->$method() as $select) {
            $exists[] = "$operation (".$this->writer->write($select, false).')';
        }

        return $exists;
    }
@param Where  $where
@param string $method
@param string $operation

@return array