code: @SuppressWarnings("rawtypes")
      public List<Interval> getIntervals() {
  
          List<Interval> lstIntervals = new ArrayList<Interval>();
          for (AbstractEdge<T> e : this.edges) {
              lstIntervals.addAll(e.getIntervals());
          }
          return lstIntervals;
      }
docs: Collect all intervals of all outgoing edges
  
  @return