transport-belt-to-ground
    distance_to_enter = double
    position_shift = double(0.25)
    speed = double
    max_distance = uint8_t(5)
    animation_speed_coefficient = double(1)
    belt_horizontal = Animation
    belt_vertical = Animation
    ending_top = Animation
    ending_bottom = Animation
    ending_side = Animation
    starting_top = Animation
    starting_bottom = Animation
    starting_side = Animation
    structure = { -- Sprite4Ways
        direction_in
        direction_out
    }
    underground_sprite = Sprite
    ending_patch = Sprite4Way
