class LateBindingMeter

class LateBindingMeter implements MeterInterface {
    private ?MeterInterface $meter = null;
    
    /** @param Closure(): MeterInterface $factory */
    public function __construct(Closure $factory) {
    }
    public function batchObserve(callable $callback, AsynchronousInstrument $instrument, AsynchronousInstrument ...$instruments) : ObservableCallbackInterface {
        return ($this->meter ??= ($this->factory)())
            ->batchObserve($callback, $instrument, ...$instruments);
    }
    public function createCounter(string $name, ?string $unit = null, ?string $description = null, array $advisory = []) : CounterInterface {
        return ($this->meter ??= ($this->factory)())
            ->createCounter($name, $unit, $description, $advisory);
    }
    public function createObservableCounter(string $name, ?string $unit = null, ?string $description = null, callable|array $advisory = [], callable ...$callbacks) : ObservableCounterInterface {
        return ($this->meter ??= ($this->factory)())
            ->createObservableCounter($name, $unit, $description, $advisory, $callbacks);
    }
    public function createHistogram(string $name, ?string $unit = null, ?string $description = null, array $advisory = []) : HistogramInterface {
        return ($this->meter ??= ($this->factory)())
            ->createHistogram($name, $unit, $description, $advisory);
    }
    public function createGauge(string $name, ?string $unit = null, ?string $description = null, array $advisory = []) : GaugeInterface {
        return ($this->meter ??= ($this->factory)())
            ->createGauge($name, $unit, $description, $advisory);
    }
    public function createObservableGauge(string $name, ?string $unit = null, ?string $description = null, callable|array $advisory = [], callable ...$callbacks) : ObservableGaugeInterface {
        return ($this->meter ??= ($this->factory)())
            ->createObservableGauge($name, $unit, $description, $advisory, $callbacks);
    }
    public function createUpDownCounter(string $name, ?string $unit = null, ?string $description = null, array $advisory = []) : UpDownCounterInterface {
        return ($this->meter ??= ($this->factory)())
            ->createUpDownCounter($name, $unit, $description, $advisory);
    }
    public function createObservableUpDownCounter(string $name, ?string $unit = null, ?string $description = null, callable|array $advisory = [], callable ...$callbacks) : ObservableUpDownCounterInterface {
        return ($this->meter ??= ($this->factory)())
            ->createObservableUpDownCounter($name, $unit, $description, $advisory, $callbacks);
    }

}