League\CommonMark\Cursor::getFirstNonSpaceCharacter PHP Method

    public function getFirstNonSpaceCharacter()
    {
        return $this->getCharacter($this->getFirstNonSpacePosition());
    }

 /**
  * @param ContextInterface $context
  * @param Cursor $cursor
  *
  * @return bool
  */
 public function parse(ContextInterface $context, Cursor $cursor)
 {
     if (!in_array($cursor->getFirstNonSpaceCharacter(), IconBlock::getIconBlockTypes()) || $cursor->getCharacter($cursor->getFirstNonSpacePosition() + 1) !== '>') {
         return false;
     }
     $type = $cursor->getFirstNonSpaceCharacter();
     $cursor->advanceToFirstNonSpace();
     if ($cursor->peek() === '>') {
         $cursor->advanceBy(2);
         if ($cursor->getCharacter() === ' ') {
             $cursor->advance();
         }
     }
     $context->addBlock(new IconBlock($type));
     return true;
 }