code: private static boolean validatePageToken(String pageToken) {
  		if (pageToken == null || "".equals(pageToken)) {
  			logger.error("FbBotMill validation error: Page token can't be null or empty! Have you called the method FbBotMillContext.getInstance().setup(String, String)?");
  			return false;
  		}
  		return true;
  	}
docs: Validates a Facebook Page Token.
  
  @param pageToken
  the token to validate.
  @return true if the token is not null or empty, false otherwise.