Show a simple single line progress bar with a custom message.
$this->progressLine = new \WebServCo\Framework\Cli\Progress\Line();
# optional: don't show result
$this->progressLine->setShowResult(false);
$i = 0; // pl counter
++$i; // pl increment
$this->outputCli(
$this->progressLine->prefix(sprintf('Processing item %s', $i)),
false
); // pl prefix
// processing
//$result = ... (bool)
$this->outputCli($this->progressLine->suffix($result), false); // pl suffix
$this->progressLine->finish(); //pl finish