<?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; }
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