Method findMethod

java/lib/src/main/java/io/github/ccxt/Helpers.java:836–869

(Class<?> cls, String name, int argCount)

    // --------- helpers ---------

    private static Method findMethod(Class<?> cls, String name, int argCount) {
        // Search child-first (normal Java resolution order) but collect candidates.
        // Prefer varargs methods over non-varargs when both match — varargs methods
        // are the untyped transpiled methods (Object... params, CompletableFuture returns)
        // while non-varargs are typed overloads (String/Long/Map params, sync returns)
        // that don't work with callDynamically's Object[] args.
        Method nonVarArgsMatch = null;

        Class<?> cur = cls;
        while (cur != null) {
            for (Method m : cur.getDeclaredMethods()) {
                if (!m.getName().equals(name)) continue;

                // Varargs method that can accept this arg count: return immediately
                if (m.isVarArgs() && argCount >= m.getParameterCount() - 1) {
                    return m;
                }

                // Exact arg count match: save as fallback (typed overload)
                if (m.getParameterCount() == argCount && nonVarArgsMatch == null) {
                    nonVarArgsMatch = m;
                }
            }
            cur = cur.getSuperclass();
        }

        if (nonVarArgsMatch != null) return nonVarArgsMatch;

        // last resort: first by name
        for (Method m : cls.getMethods()) {
            if (m.getName().equals(name)) return m;
        }
        throw new RuntimeException("Method not found: " + name + " with " + argCount + " args on " + cls.getName());
    }

    private static Long toLong(Object o) {
        if (o instanceof Long) return (Long) o;