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gEfiFirmwareVolumeBlock2ProtocolGuid

Include/Protocol/FirmwareVolumeBlock.h

PROTOCOL Information

PROTOCOL's Guid NamePROTOCOL's Guid
gEfiFirmwareVolumeBlock2ProtocolGuid{ 0x8f644fa9, 0xe850, 0x4db1, {0x9c, 0xe2, 0xb, 0x44, 0x69, 0x8e, 0x8d, 0xa4 } }

Refer to Header File

MdePkg/Include/Protocol/FirmwareVolumeBlock.h