Implement SpectralArrow#getGlowingTicks and SpectralArrow#setGlowingTicks(int)

nms-patches/EntitySpectralArrow.patch

@@ -0,0 +1,11 @@
+--- a/net/minecraft/server/EntitySpectralArrow.java
++++ b/net/minecraft/server/EntitySpectralArrow.java
+@@ -2,7 +2,7 @@
+ 
+ public class EntitySpectralArrow extends EntityArrow {
+ 
+-    private int f = 200;
++    public int f = 200; // PAIL: private to public
+ 
+     public EntitySpectralArrow(World world) {
+         super(world);

src/main/java/org/bukkit/craftbukkit/entity/CraftSpectralArrow.java

@@ -25,4 +25,14 @@ public class CraftSpectralArrow extends CraftArrow implements SpectralArrow {
     public EntityType getType() {
         return EntityType.SPECTRAL_ARROW;
     }
+
+    @Override
+    public int getGlowingTicks() {
+        return getHandle().f; // PAIL: Rename glowingDuration
+    }
+
+    @Override
+    public void setGlowingTicks(int duration) {
+        getHandle().f = duration;
+    }
 }