## Request, System and Cluster Metrics

At a high level metrics are grouped into three categories, listed in the following sub-sections. The path in each of the tables is relative to the top-level endpoint.

func IsJSON() bool {
	return jsonFlag
}

// IsQuiet - returns true if quietFlag is true
func IsQuiet() bool {
	return quietFlag
}

// RegisterError registers the specified rendering function. This latter
// will be called for a pretty rendering of fatal errors.
func RegisterError(f func(string, error, bool) string) {
	errorFmtFunc = f
}

// uniq swaps away duplicate elements in data, returning the size of the