code: public function add($sourceDir, array $options, $username)
      {
          $this->resolveAddOptions($options);
          $this->createContributorDir($sourceDir, $options, $username);
  
          $dir = $this
              ->init($sourceDir, $options, $username)
              ->getDirInUse()
          ;
          $blockName = $this->addBlockToSlot($dir, $options);
          $blockContent = $this->addBlock($dir, $options, $blockName);
  
          DataLogger::log(
              sprintf(
                  'Block "%s" has been added to the "%s" slot on page "%s" for the "%s_%s" language',
                  $blockName,
                  $options["slot"],
                  $options["page"],
                  $options["language"],
                  $options["country"]
              )
          );
  
          return $blockContent;
      }
docs: Adds the block to the slot for the given language and page
  
  @param string $sourceDir
  @param array $options
  @param string $username
  
  @return string The saved content