improve(syncmap): enforce one statement per line and stricter visibility

Author: vectrixdevelops

.checkstyle/checkstyle.xml

@@ -188,7 +188,7 @@
     </module>
 
     <!-- https://checkstyle.org/config_coding.html#OneStatementPerLine -->
-    <!-- <module name="OneStatementPerLine"/> -->
+    <module name="OneStatementPerLine"/>
 
     <!-- https://checkstyle.org/config_misc.html#OuterTypeFilename -->
     <module name="OuterTypeFilename"/>

collections-fastutil/src/jmh/java/space/vectrix/sync/collections/fastutil/Int2ObjectSyncMapBenchmark.java

@@ -71,7 +71,7 @@ public void setup() {
       final boolean prepopulate = "prepopulate".equalsIgnoreCase(this.mode);
 
       switch(this.implementation) {
-        case "SyncMap" -> this.map = presized ? new Int2ObjectSyncMap<>(Hashing.FASTEST_MIX, this.size) : new Int2ObjectSyncMap<>(Hashing.FASTEST_MIX);
+        case "SyncMap" -> this.map = presized ? new Int2ObjectSyncMap<>(Int2ObjectSyncMap.FASTEST_SPREAD, this.size) : new Int2ObjectSyncMap<>(Int2ObjectSyncMap.FASTEST_SPREAD);
         case "SynchronizedMap" -> this.map = presized
           ? Int2ObjectMaps.synchronize(new Int2ObjectOpenHashMap<>(this.size))
           : Int2ObjectMaps.synchronize(new Int2ObjectOpenHashMap<>());