public DependencyGraph getSubGraph(Object start) {
    DependencyGraph result = new DependencyGraph();

    populateSubGraph(start, result);

    return result;
  }
Get the subgraph that the starting object has dependencies on.

This does not include any objects that have dependencies on the starting object.
geode-core/src/main/java/org/apache/geode/distributed/internal/deadlock/DependencyGraph.java