diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/utils/CacheOperations.kt b/quartz/src/main/java/com/vitorpamplona/quartz/utils/CacheOperations.kt
index b1c9a9ccc..c44ff5814 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/utils/CacheOperations.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/utils/CacheOperations.kt
@@ -123,24 +123,12 @@ interface CacheOperations<K, V> {
         return runner.results
     }
 
-    fun <T, U> associateNotNull(transform: (K, V) -> Pair<T, U>?): Map<T, U> {
-        val runner = CacheCollectors.BiAssociateNotNullCollector(size(), transform)
-        forEach(runner)
-        return runner.results
-    }
-
     fun <U> associateWith(transform: (K, V) -> U?): Map<K, U?> {
         val runner = CacheCollectors.BiAssociateWithCollector(size(), transform)
         forEach(runner)
         return runner.results
     }
 
-    fun <U> associateNotNullWith(transform: (K, V) -> U): Map<K, U> {
-        val runner = CacheCollectors.BiAssociateNotNullWithCollector(size(), transform)
-        forEach(runner)
-        return runner.results
-    }
-
     fun joinToString(
         separator: CharSequence = ", ",
         prefix: CharSequence = "",
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeCache.kt b/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeCache.kt
index 962932c9a..fe59fca30 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeCache.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeCache.kt
@@ -67,7 +67,7 @@ class LargeCache<K, V> : CacheOperations<K, V> {
         key: K,
         builder: (key: K) -> V,
     ): Boolean {
-        val value = cache.get(key)
+        val value = cache[key]
         return if (value != null) {
             false
         } else {
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeSoftCache.kt b/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeSoftCache.kt
index 17f9ba265..995c0701c 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeSoftCache.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/utils/LargeSoftCache.kt
@@ -78,7 +78,7 @@ class LargeSoftCache<K, V> : CacheOperations<K, V> {
         key: K,
         builder: (key: K) -> V,
     ): V {
-        val softRef = cache.get(key)
+        val softRef = cache[key]
         val value = softRef?.get()
 
         return if (value != null) {
@@ -89,20 +89,6 @@ class LargeSoftCache<K, V> : CacheOperations<K, V> {
         }
     }
 
-    fun createIfAbsent(
-        key: K,
-        builder: (key: K) -> V,
-    ): Boolean {
-        val softRef = cache.get(key)
-        val value = softRef?.get()
-        return if (value != null) {
-            false
-        } else {
-            val newObject = builder(key)
-            cache.putIfAbsent(key, WeakReference(newObject)) == null
-        }
-    }
-
     /**
      * Proactively cleans up the cache by removing entries whose weakly referenced
      * objects have been garbage collected. While `get` handles cleanup on access,