public function __toString()
{
return $this->prompt . sprintf($this->locale->_('%1$s: %2$s.'), $this->titleColorizer->colorize($this->locale->_('Memory usage')), $this->memoryColorizer->colorize($this->value === null ? $this->locale->_('unknown') : sprintf($this->locale->_('%4.2f Mb'), $this->value / 1048576))) . PHP_EOL;
}