FeatureFlagResult

Name	Type
`key`	`string`
`enabled`	`boolean`
Whether the returned feature flag evaluation is enabled. `false` is a conclusive off result.
`variant`	`string`
`payload`	`JsonType`
`reason`	`string`
PostHog's evaluation explanation, when available.
`reasonCode`	`string`
Stable evaluation reason code, when available (for example, `flag_disabled`).