toList :: GenericInstallPlan ipkg srcpkg iresult ifailure
       -> [GenericPlanPackage ipkg srcpkg iresult ifailure]
toList = PackageIndex.allPackages . planIndex
toList :: GenericInstallPlan ipkg srcpkg iresult ifailure
       -> [GenericPlanPackage ipkg srcpkg iresult ifailure]
toList = PackageIndex.allPackages . planIndex
toList = PackageIndex.allPackages . planIndex