Added factory method to the Update

IDEA-CR-26236

platform/platform-api/src/com/intellij/util/ui/update/Update.java

@@ -16,6 +16,7 @@
 package com.intellij.util.ui.update;
 
 import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 
@@ -99,4 +100,13 @@ public abstract class Update extends ComparableObject.Impl implements Runnable {
   public boolean isRejected() {
     return myRejected;
   }
+
+  public static Update create(@NonNls Object identity, @NotNull Runnable runnable) {
+    return new Update(identity) {
+      @Override
+      public void run() {
+        runnable.run();
+      }
+    };
+  }
 }