FlagBlueYellow is a wrapper around a boolean flag that serves to conventionalise a blue/green (or in this case blue/yellow) rollout pattern.

FlagContextFromContext returns any LaunchDarkly context stored on the passed Go context, or the "unknown" user context if none is found.

Override allows setting flag overrides.

SpanAttributes returns a slice of span attributes containing the values of all feature flags (under the "flags." namespace).

WithFlagContext returns a child context that has had the provided LaunchDarkly context stored on it.