LDClient method variation_detail allows you to evaluate a feature flag (using the same parameters as you would for variation) and receive more information about how the value was calculated. This information is returned in an EvaluationDetail object, which contains both the result value and a "reason" object which will tell you, for instance, if the user was individually targeted for the flag or was matched by one of the flag's rules, or if the flag returned the default value due to an error.Fetched April 11, 2026