code: public function setKeys($data)
      {
          foreach ($data as $setter) {
              if (array_key_exists('key', $setter)) {
                  $key     = $this->formatter->formatKey($setter['key']);
                  $value   = array_key_exists('value', $setter) ? $setter['value'] : null;
                  $comment = array_key_exists('comment', $setter) ? $setter['comment'] : null;
                  $export  = array_key_exists('export', $setter) ? $setter['export'] : false;
  
                  if (!is_file($this->filePath) || !$this->keyExists($key)) {
                      $this->writer->appendSetter($key, $value, $comment, $export);
                  } else {
                      $oldInfo = $this->getKeys([$key]);
                      $comment = is_null($comment) ? $oldInfo[$key]['comment'] : $comment;
                      $this->writer->updateSetter($key, $value, $comment, $export);
                  }
              }
          }
  
          return $this;
      }
docs: Set many keys to buffer
  
  @param  array  $data
  
  @return DotenvEditor