jaeger-client -> opentelemetry

vendor/open-telemetry/context/Propagation/PropagationGetterInterface.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\Context\Propagation;
+
+/**
+ * @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.6.1/specification/context/api-propagators.md#getter-argument
+ */
+interface PropagationGetterInterface
+{
+    /**
+     * Returns the list of all the keys in the carrier.
+     *
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.6.1/specification/context/api-propagators.md#keys
+     *
+     * @return list<string>
+     */
+    public function keys($carrier): array;
+
+    /**
+     * Gets the value of a given key from a carrier.
+     */
+    public function get($carrier, string $key) : ?string;
+}