code: public function echo($type, $content)
      {
          if ($this->option('debug') == false) {
              return;
          }
  
          // skip empty lines
          if (trim($content)) {
              $this->{$type}($content);
          }
      }
docs: Write text to the screen for the user to see.
  
  @param [string] $type    line, info, comment, question, error
  @param [string] $content