def callback(name, params, returns)
      params, returns = generate_signature(params, returns)
      super name.to_sym, params, returns
    end
def callback(name, params, returns)
      params, returns = generate_signature(params, returns)
      super name.to_sym, params, returns
    end
Wrapper for FFI::Library.callback() that converts Win32/shortcut argument types into FFI-compliant types.
 This method overrides FFI::Library.callback