Made runnables safer

src/main/kotlin/net/axay/kspigot/main/KSpigot.kt

@@ -1,16 +1,18 @@
 package net.axay.kspigot.main
 
-import net.axay.kspigot.runnables.KRunnables
+import net.axay.kspigot.runnables.KRunnableHolder
 import org.bukkit.plugin.java.JavaPlugin
 
 class KSpigot(val plugin: JavaPlugin) {
 
+    val kRunnableHolder = KRunnableHolder()
+
     /**
      * This function should be invoked
      * in the onDisable() method of your plugin.
      */
     fun shutdown() {
-        KRunnables.shutdown()
+        kRunnableHolder.shutdown()
     }
 
 }

src/main/kotlin/net/axay/kspigot/runnables/KRunnableHolder.kt

@@ -4,7 +4,7 @@ import net.axay.kspigot.main.KSpigot
 import org.bukkit.Bukkit
 import org.bukkit.scheduler.BukkitRunnable
 
-object KRunnables {
+class KRunnableHolder {
 
     val runnableEndCallbacks = HashMap<BukkitRunnable, () -> Unit>()
 
@@ -75,7 +75,7 @@ fun bukkitRunnable(
 
                     endCallback?.let {
                         it.invoke()
-                        KRunnables.runnableEndCallbacks -= this
+                        kSpigot.kRunnableHolder.runnableEndCallbacks -= this
                     }
 
                     return
@@ -88,7 +88,7 @@ fun bukkitRunnable(
 
         if (safe)
             if (endCallback != null)
-                KRunnables.runnableEndCallbacks[bukkitRunnable] = endCallback
+                kSpigot.kRunnableHolder.runnableEndCallbacks[bukkitRunnable] = endCallback
 
         if (sync)
             bukkitRunnable.runTaskTimer(kSpigot.plugin, realDelay, realPeriod)