Constructs DesktopFile with "Desktop Entry" group and Version set to 1.1
auto df = new DesktopFile(); assert(df.desktopEntry()); assert(df.desktopEntry().escapedValue("Version") == "1.1"); assert(df.categories().empty); assert(df.type() == DesktopFile.Type.Unknown);
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Constructs DesktopFile with "Desktop Entry" group and Version set to 1.1