FeatureFlagChangeListener (launchdarkly-android-client-sdk 4.2.0 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface FeatureFlagChangeListener
```
Callback interface used for listening to changes to a feature flag.

See Also:

LDClientInterface.registerFeatureFlagListener(String, FeatureFlagChangeListener)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onFeatureFlagChange(java.lang.String flagKey)`	The SDK calls this method when a feature flag value has changed for the current evaluation context.

- Method Detail
  - onFeatureFlagChange
```
void onFeatureFlagChange(java.lang.String flagKey)
```
    The SDK calls this method when a feature flag value has changed for the current evaluation context.
    To obtain the new value, call one of the client methods such as LDClientInterface.boolVariation(String, boolean).
    
    Parameters:
    
    flagKey - the feature flag key