$ oc explain prometheus.spec.remoteWrite.sendExemplars
GROUP:      monitoring.coreos.com
KIND:       Prometheus
VERSION:    v1FIELD: sendExemplars <boolean>DESCRIPTION:
    Enables sending of exemplars over remote write. Note that exemplar-storage
    itself must be enabled using the `spec.enableFeature` option for exemplars
    to be scraped in the first place. 
     It requires Prometheus >= v2.27.0.

$ oc explain prometheus.spec.enableFeature
GROUP:      monitoring.coreos.com
KIND:       Prometheus
VERSION:    v1
error: field "enableFeature" does not exist 

$ oc explain prometheus.spec.enableFeatures
GROUP:      monitoring.coreos.com
KIND:       Prometheus
VERSION:    v1FIELD: enableFeatures <[]string>
DESCRIPTION:
    Enable access to Prometheus feature flags. By default, no features are
    enabled. 
     Enabling features which are disabled by default is entirely outside the
    scope of what the maintainers will support and by doing so, you accept that
    this behaviour may break at any time without notice. 
     For more information see
    https://prometheus.io/docs/prometheus/latest/feature_flags/ 

 4.15 and 4.16

always