Joshua Harlow 26a70ea5df Don't allow mutating operations on the underlying graph ...

Instead of allowing a direct graph return of the underlying
graph_flow graph we should return a frozen version instead so that
users of the returned value can not mutate the graph without going
through the graph_flow pattern (which could have undesired and
harmful side-effects if this occurs).

Change-Id: I38b35119d6e7bd7387b8ab467eba53aee5500629

2013-09-30 00:02:04 +00:00

4.9 KiB

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