Add PathfinderGoalPanic for diff visibility.

src/main/java/net/minecraft/server/PathfinderGoalPanic.java

@@ -0,0 +1,41 @@
+package net.minecraft.server;
+
+public class PathfinderGoalPanic extends PathfinderGoal {
+
+    private EntityCreature a;
+    private double b;
+    private double c;
+    private double d;
+    private double e;
+
+    public PathfinderGoalPanic(EntityCreature entitycreature, double d0) {
+        this.a = entitycreature;
+        this.b = d0;
+        this.a(1);
+    }
+
+    public boolean a() {
+        if (this.a.getLastDamager() == null && !this.a.isBurning()) {
+            return false;
+        } else {
+            Vec3D vec3d = RandomPositionGenerator.a(this.a, 5, 4);
+
+            if (vec3d == null) {
+                return false;
+            } else {
+                this.c = vec3d.c;
+                this.d = vec3d.d;
+                this.e = vec3d.e;
+                return true;
+            }
+        }
+    }
+
+    public void c() {
+        this.a.getNavigation().a(this.c, this.d, this.e, this.b);
+    }
+
+    public boolean b() {
+        return !this.a.getNavigation().g();
+    }
+}