League\CommonMark\Context::setNextLine PHP Method

    public function setNextLine($line)
    {
        ++$this->lineNumber;
        $this->line = $line;
    }

 /**
  * @param string $input
  *
  * @return Document
  */
 public function parse($input)
 {
     $context = new Context(new Document(), $this->getEnvironment());
     $lines = $this->preProcessInput($input);
     foreach ($lines as $line) {
         $context->setNextLine($line);
         $this->incorporateLine($context);
     }
     while ($context->getTip()) {
         $context->getTip()->finalize($context);
     }
     $this->processInlines($context, $context->getDocument());
     return $context->getDocument();
 }