Using GATE Developer 8.5.1 with ANNIE in Eclipse project

Question

I've installed GATE Developer 8.5.1, and working on a project for NLP in Eclipse,

I use this code to use later tokenizer and gazeetter:

  Gate.getCreoleRegister().registerDirectories(
            new File(Gate.getPluginsHome(), "ANNIE").toURI().toURL());

But it make a line over it, and show error icon with this message :

the method registerDirectories for type CreoleRegister has deprecated

and when I use addDirectories() instead, it hints me to use registerDirectories() ??

Also, when I try to get plugins home:

System.out.println(Gate.getPluginsHome());      

It prints null, even I load ANNIE from GATE developer GUI but I cannot find plugin folder in the gate folder which installed in my PC.

Please, any hint will be useful for me.