This method is from a program implementing a tree in Java. The method height finds the height of a specified node in the tree. Please explain how this method works.

public int height TNode node) if (isLeaf (node)) return 0; int maxChild = 0; Iterator cnode.children () while (c.hasNext( int hc = height (c.next()); if (hc > maxChild) maxChild = hc ; return maxChild + 1