<?php declare(strict_types=1); namespace OpenTelemetry\Context; /** * @psalm-internal OpenTelemetry */ final class ContextKeys { public static function span(): ContextKeyInterface { static $instance; return $instance ??= Context::createKey('opentelemetry-trace-span-key'); } public static function baggage(): ContextKeyInterface { static $instance; return $instance ??= Context::createKey('opentelemetry-trace-baggage-key'); } }
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