Function rustc_incremental::assert_dep_graph::filter_nodes

pub(in assert_dep_graph) fn filter_nodes<'q>(
    query: &'q DepGraphQuery, 
    sources: &Option<FxHashSet<&'q DepNode>>, 
    targets: &Option<FxHashSet<&'q DepNode>>
) -> FxHashSet<&'q DepNode>