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gEfiUsbFunctionIoProtocolGuid

Include/Protocol/UsbFunctionIo.h

PROTOCOL Information

PROTOCOL's Guid NamePROTOCOL's Guid
gEfiUsbFunctionIoProtocolGuid{ 0x32d2963a, 0xfe5d, 0x4f30, {0xb6, 0x33, 0x6e, 0x5d, 0xc5, 0x58, 0x3, 0xcc }}

Refer to Header File

MdePkg/Include/Protocol/UsbFunctionIo.h