prepare 5.6.2 release (#245)

Author: LaunchDarklyReleaseBot

src/main/java/com/launchdarkly/sdk/server/FeatureFlagsState.java

@@ -189,6 +189,23 @@ public Builder valid(boolean valid) {
       return this;
     }
 
+    /**
+     * Adds data to the builder representing the result of a feature flag evaluation.
+     * <p>
+     * The {@code flagVersion}, {@code trackEvents}, and {@code debugEventsUntilDate} parameters are
+     * normally generated internally by the SDK; they are used if the {@link FeatureFlagsState} data
+     * has been passed to front-end code, to control how analytics events are generated by the front
+     * end. If you are using this builder in back-end test code, those values are unimportant.
+     * 
+     * @param flagKey the feature flag key
+     * @param value the evaluated value
+     * @param variationIndex the evaluated variation index
+     * @param reason the evaluation reason
+     * @param flagVersion the current flag version 
+     * @param trackEvents true if full event tracking is turned on for this flag
+     * @param debugEventsUntilDate if set, event debugging is turned until this time (millisecond timestamp) 
+     * @return the builder
+     */
     public Builder add(
         String flagKey,
         LDValue value,
@@ -225,7 +242,12 @@ Builder addFlag(DataModel.FeatureFlag flag, Evaluator.EvalResult eval) {
           );
     }
 
-    FeatureFlagsState build() {
+    /**
+     * Returns an object created from the builder state.
+     * 
+     * @return an immutable {@link FeatureFlagsState}
+     */
+    public FeatureFlagsState build() {
       return new FeatureFlagsState(flagMetadata.build(), valid);
     }
   }