Add U.defer(runnable).

Author: javadev

src/main/java/com/github/underscore/U.java

@@ -2027,6 +2027,16 @@ public static <T> java.util.concurrent.ScheduledFuture<T> defer(final Supplier<T
         return delay(function, 0);
     }
 
+    public static java.util.concurrent.ScheduledFuture<Void> defer(final Runnable runnable) {
+        return delay(new Supplier<Void>() {
+            @Override
+            public Void get() {
+                runnable.run();
+                return null;
+            }
+        }, 0);
+    }
+
     public static <T> Supplier<T> throttle(final Supplier<T> function, final int waitMilliseconds) {
         class ThrottleFunction implements Supplier<T> {
             private final Supplier<T> localFunction;

src/test/java/com/github/underscore/FunctionsTest.java

@@ -186,6 +186,9 @@ public Boolean call() {
                 return true;
             }
         });
+        U.defer(new Runnable() { public void run() {
+            }
+        });
     }
 
 /*