Float64Ptr gives a pointer to a variable with the same value as f.

Int64Ptr gives a pointer to a variable with the same value as i.

Once polls the backend and puts the data to the given service one time.

SourceConfig is the set of data required to configure a kubernetes data source (e.g., kubelet or kube-controller).

MetricsSource is an object that provides kubernetes metrics in Stackdriver format, probably from a backend like the kubelet.