——— libusb binding initialization ———
USB::Endpoint#bDescriptorType
USB::Endpoint#bEndpointAddress
USB::Endpoint#bInterval
USB::Endpoint#bLength
USB::Endpoint#bRefresh
USB::Endpoint#bSynchAddress
USB::Endpoint#bmAttributes
USB::Endpoint#revoked?
USB::Endpoint#setting
USB::Endpoint#wMaxPacketSize
[Validate]