UpDownCounterInterface.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\API\Metrics;

use OpenTelemetry\Context\ContextInterface;
interface UpDownCounterInterface extends SynchronousInstrument {
    
    /**
     * @param float|int $amount amount to increment / decrement by
     * @param iterable<non-empty-string, string|bool|float|int|array|null> $attributes
     *        attributes of the data point
     * @param ContextInterface|false|null $context execution context
     */
    public function add($amount, iterable $attributes = [], $context = null) : void;

}