changed visibility levels

integraal/integraal-explanation/src/main/java/fr/boreal/explanation/tracker_gri/explainers/AbstractStaticGRIBasedExplainer_TrackerGRI.java

@@ -18,12 +18,12 @@ public abstract class AbstractStaticGRIBasedExplainer_TrackerGRI<ExplanationType
     /**
      * This set is needed to recall the initial atoms of the kb
      */
-    private final HashSet<Atom> intialAtoms;
+    protected final HashSet<Atom> intialAtoms;
 
     /**
      * default solver
      */
-    private Solver solver = new MARCOGMUSSolver();
+    protected Solver solver = new MARCOGMUSSolver();
     /*
      * A KB where we want to trace atoms
      */