code: public function getComponentUrl(string $name, bool $asAbsolute = true): ?string
      {
          $rootMap = $this->getConfig('componentsRootMap');
          $siteUrl = $asAbsolute ? $this->siteBaseUrl : '';
          return isset($rootMap[$name]) ? $siteUrl.$rootMap[$name] : null;
      }
docs: The method returns absolute or relative path (URL) to the component by
  passed name. The absolute URL used to determs path to assets (media-data)
  as usual.
  @param string $name The component name.
  @param boolean $asAbsolute The optional flag is equal true by default.
  @return string|null