code: protected boolean isAliasBelowBaseFolder(CmsAlias alias) {
  
          boolean isBelowBaseFolder = CmsStringUtil.isPrefixPath(m_baseFolderSitePath, alias.getAliasPath());
          return isBelowBaseFolder;
      }
docs: Checks whether the given alias is below the base folder.<p>
  
  @param alias the alias to check
  
  @return true if the alias is below the base folder