pr feedback

Author: sanzmauro

client/src/main/java/io/split/client/SplitManagerImpl.java

@@ -10,7 +10,13 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
 import java.util.concurrent.TimeoutException;
 
 /**