dist/cytoscape.esm.js
function addChildren(node) {
    var children = node._private.children;

    for (var i = 0; i < children.length; i++) {
      add(children[i]);
    }
  }
function addChildren(node) {
    var children = node._private.children;

    for (var i = 0; i < children.length; i++) {
      add(children[i]);
    }
  }
function addChildren ( node ) { var children = node . _private . children ; for ( var i = 0 ; i < children . length ; i ++ ) { add ( children [ i ] ) ; } }
add descendant nodes
add descendant nodes