/**
* Write a string to standard output.
*
* @param string $text The text to display.
* @param boolean $nl True (default) to append a new line at the end of the output string.
*
* @return $this
*
* @since 4.0.0
* @throws \RuntimeException
* @codeCoverageIgnore
*/
public function out($text = '', $nl = true)
{
fwrite(STDOUT, $text . ($nl ? "\n" : null));
return $this;
}