A walk supporting device includes a seating member on which a user is seated in a straddling manner and a pair of left and right leg links that support the seating member from below. The casing structure includes a case member having an opening, and an electronic equipment support member. In response to the channel quality exceeding a threshold, the station can be signaled to establish a second communication link with the network node in accordance with a second wireless communications protocol. A solid powder material is mixed with a polymer binder and adhered to a transparent substrate to form the optical transforming layer. During compilation, the method finally comprises performing overload resolution at a call site of an overloaded function by checking for compatibility with a first execution space specified by one of the plurality of conditional if-statements, wherein the overloaded function is called within the body of the function.