code: public static String getStringInitParameter(ExternalContext context, String name)
      {
          return getStringInitParameter(context,name,null);
      }
docs: Gets the String init parameter value from the specified context. If the parameter is an empty String or a String
  containing only white space, this method returns <code>null</code>
  
  @param context
  the application's external context
  @param name
  the init parameter's name
  
  @return the parameter if it was specified and was not empty, <code>null</code> otherwise
  
  @throws NullPointerException
  if context or name is <code>null</code>