pub fn find_earliest_revision<G>(
    graph: &G,
    src: usize
) -> Option<EarliestRevision>where
    G: SwhBackwardGraph + SwhGraphWithProperties,
    <G as SwhGraphWithProperties>::Maps: Maps,
    <G as SwhGraphWithProperties>::Timestamps: Timestamps,
Expand description

Given a content/directory id, returns the id of the oldest revision that contains it