help with method overloading

Unity Engine
1 
[I][COLOR=#ff0000]private void OnParticleCollisionManual(GameObject other, int aliveParticles = -1)[/COLOR][/I]
    {
        collisionEvents.Clear();
        var aliveEvents = initiatorPS.GetCollisionEvents(other, collisionEvents);
        for (int i = 0; i < aliveEvents; i++)
        {
            var angle = Vector3.Angle(collisionEvents[i].normal, Vector3.up);
            if (angle > MaxGroundAngleDeviation) continue;
            if (InstantiateWhenZeroSpeed)
            {
                if (collisionEvents[i].velocity.sqrMagnitude > 0.1f) continue;
                var isNearDistance = false;
                for (int j = 0; j < aliveParticles; j++)
                {
                    var distance = Vector3.Distance(collisionEvents[i].intersection, particles[j].position);
                    if (distance < MinDistanceBetweenDecals) isNearDistance = true;
                }
                if (isNearDistance) continue;
            }
            var emiter = new ParticleSystem.EmitParams();
            emiter.position = collisionEvents[i].intersection + collisionEvents[i].normal * MinDistanceBetweenSurface;
            var rotation = Quaternion.LookRotation(-collisionEvents[i].normal).eulerAngles;
            rotation.z = Random.Range(0, 360);
            emiter.rotation3D = rotation;

            DecalParticles.Emit(emiter, 1);
        }
    }

void OnParticleCollision(GameObject other)
    {
        if (InstantiateWhenZeroSpeed)
        {
            if (!collidedGameObjects.Contains(other))
               [I][COLOR=#ff0000] collidedGameObjects.Add(other);[/COLOR][/I]
        }
        else
        {
            OnParticleCollisionManual(other);
        }
    }
}

I cant use default parameters and these 2 functions use it. I need to change them to not use default parameters. I heard of method overloading, but when i tried i couldnt get it to work. Can someone help me with it?

Edit: the code snippets that have “color” in front of them are the issue.

2

Unfortunately, callback methods cannot be overloaded. In order for this to work, the Unity developers would have to modify the MonoBehavior class and implement the new overloaded method.