Remove erasure warning

Upgrade gradle to 4.4

Author: sinwe

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip
+#Mon Dec 11 07:53:02 SGT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

src/main/scala/reactor/core/scala/publisher/Flux.scala

@@ -1786,9 +1786,7 @@ class Flux[T] private[publisher](private[publisher] val jFlux: JFlux[T]) extends
     *
     * @return an indexed [[Flux]] with each source value combined with its 0-based index.
     */
-  final def index(): Flux[(Long, T)] = Flux(jFlux.index()).map(tupleTwo2ScalaTuple2) map {
-    case (jLong: JLong, t: T) => (Long2long(jLong), t)
-  }
+  final def index(): Flux[(Long, T)] = Flux(jFlux.index()).map(t2 => (Long2long(t2.getT1), t2.getT2))
 
   /**
     * Keep information about the order in which source values were received by