code: private boolean containsRestrictedPrefix(String tpl)
  	{
  		for (String i : blackPrefixList) {
  			if (tpl.startsWith(i))
  				return true;
  		}
  		return false;
  	}
docs: Checks if the input string contains prefixes from black list
  
  @param tpl
  string to check
  @return