code: func getNodesAboveCumCutoff(nodes Nodes, nodeCutoff int64) Nodes {
  	cutoffNodes := make(Nodes, 0, len(nodes))
  	for _, n := range nodes {
  		if abs64(n.Cum) < nodeCutoff {
  			continue
  		}
  		cutoffNodes = append(cutoffNodes, n)
  	}
  	return cutoffNodes
  }
docs: // getNodesAboveCumCutoff returns all the nodes which have a Cum value greater
  // than or equal to cutoff.