code: function(node) {
          var ans = [];
          this.eachAdjacency(node, function(adj) {
              var n = adj.nodeTo;
              if(n._depth < node._depth) ans.push(n);
          });
          return ans;
      }
docs: /*
  Method: getParents
  
  Returns an Array of <Graph.Nodes> which are parents of the given node.
  
  Also implemented by:
  
  <Graph.Node>.
  
  Parameters:
  node - (object) A <Graph.Node>.
  
  Returns:
  An Array of <Graph.Nodes>.
  
  Example:
  (start code js)
  var pars = $jit.Graph.Util.getParents(node);
  or...
  var pars = node.getParents();
  
  if(pars.length > 0) {
  do stuff with parents
  }
  (end code)