message CUIFontFilePB { optional string font_file_name = 1; optional bytes opentype_font_data = 2; } message CUIFontFilePackagePB { message CUIEncryptedFontFilePB { optional bytes encrypted_contents = 1; } required uint32 package_version = 1; repeated .CUIFontFilePackagePB.CUIEncryptedFontFilePB encrypted_font_files = 2; }