Bug about gym.create_cloth_grid()

[yl-wang996]

My code:

# cloth_asset_options.armature = 0.01
cloth_width = 1
cloth_length = 1
particles_num = 20
cloth_asset = gym.create_cloth_grid(
    sim,
    cloth_width,  # int
    cloth_length,  # int
    cloth_width/particles_num,  # float
    cloth_length/particles_num,  # float
    # gymapi.AssetOptions()
)

1. When I call the function gym.create_cloth_grid(), it shows the following error:

TypeError: create_cloth_grid(): incompatible function arguments. The following argument types are supported:1. (self: isaacgym._bindings.linux-x86_64.gym_37.Gym, arg0: isaacgym._bindings.linux-x86_64.gym_37.Sim, arg1: int, arg2: int, arg3: float, arg4: float) -> isaacgym._bindings.linux-x86_64.gym_37.Asset Invoked with: <isaacgym._bindings.linux-x86_64.gym_37.Gym object at 0x7f8af5362a30>, <isaacgym._bindings.linux-x86_64.gym_37.Sim object at 0x7f8af54942b0>, 1, 1, 0.05, 0.05, <isaacgym._bindings.linux-x86_64.gym_37.AssetOptions object at 0x7f8af5494630>

The above information said, I shouldn't use the isaacgym.gymapi.AssetOptions as the last parameter, but it do exist in the API document.

2.Then I try to do what the above error said, remove the isaacgym.gymapi.AssetOptions, and I found this function return None.

So my question is, What I suppose to do, to add a cloth into the environment? and also how get the state of this cloth?