Method copyKey

api/src/test/java/io/grpc/MetadataTest.java:507–510

(
      Metadata.Key<T> key, Metadata.BinaryStreamMarshaller<T> marshaller)

  }

  private static <T> Metadata.Key<T> copyKey(
      Metadata.Key<T> key, Metadata.BinaryStreamMarshaller<T> marshaller) {
    return Metadata.Key.of(key.originalName(), marshaller);
  }
}