interface MetricMetadataInterface

interface MetricMetadataInterface {
    
    /**
     * @return string|InstrumentType
     */
    public function instrumentType();
    public function name() : string;
    public function unit() : ?string;
    public function description() : ?string;
    
    /**
     * Returns the underlying temporality of this metric.
     *
     * @return string|Temporality internal temporality
     */
    public function temporality();

}