lib/d3-flextree.js
function zerothWalk(wt, initial) {
    wt.t.y = initial;
    wt.t.depth = 0;
    _zerothWalk(wt);
  }
function zerothWalk(wt, initial) {
    wt.t.y = initial;
    wt.t.depth = 0;
    _zerothWalk(wt);
  }
function zerothWalk ( wt , initial ) { wt . t . y = initial ; wt . t . depth = 0 ; _zerothWalk ( wt ) ; }
Recursively set the y coordinate of the children, based on the y coordinate of the parent, and its height. Also set parent and depth.
Recursively set the y coordinate of the children based on the y coordinate of the parent and its height . Also set parent and depth .