Changed access control within FoldingSet for some ivars from "private" to "protected".  This allows iterators to work.
Changed access control within FoldingSet for some ivars from "private"
to "protected".  This allows iterators to work.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@43559 91177308-0d34-0410-b5e6-96231b3b80d8

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