static Map<String, Object> graphqlContext(ServiceRequestContext requestContext) {
        requireNonNull(requestContext, "requestContext");
        return ImmutableMap.of(GRAPHQL_CONTEXT_KEY, requestContext);
    }
Returns a {@link Map} containing the {@link ServiceRequestContext}.
graphql/src/main/java/com/linecorp/armeria/server/graphql/GraphqlServiceContexts.java