Method callAsync

java/lib/src/main/java/io/github/ccxt/Exchange.java:2335–2374

(Object implicitEndpoint2, Object... args)

    }

    public CompletableFuture<Object> callAsync(Object implicitEndpoint2, Object... args) {
        // First optional arg is "parameters"
        Object parameters = (args != null && args.length > 0) ? args[0] : null;

        if (parameters == null) {
            parameters = new HashMap<String, Object>();
        }

        String implicitEndpoint = (String) implicitEndpoint2;

        Object info = this.transformedApi.get(implicitEndpoint);
        if (info instanceof Map) {
            @SuppressWarnings("unchecked")
            Map<String, Object> endpointInfo = (Map<String, Object>) info;

            String method = (String) endpointInfo.get("method");
            String path   = (String) endpointInfo.get("path");
            Object api    = endpointInfo.get("api");

            Object costObj = endpointInfo.get("cost");
            Object cost = (costObj != null) ? costObj : 1;

            Map<String, Object> emptyMap = new HashMap<>();
            Map<String, Object> costMap  = new HashMap<>();
            costMap.put("cost", cost);

            // body = null here, same as in your C# comment
            // try {
            return this.fetch2(path, api, method, parameters, emptyMap, null, costMap);
                // return CompletableFuture.completedFuture(res);
            // } catch (Exception e) {
            //     // throw e;
            // }

        }

        CompletableFuture<Object> failed = new CompletableFuture<>();
        failed.completeExceptionally(new RuntimeException("Endpoint not found!"));
        return failed;
    }

    public boolean isEmpty(Object a) {
        if (a == null) {