sap.ui2.shell.getUser().load() function

HI all

I have a question reg the load() function of the User, a general way to access the user info is

oUser.load(

  {

  depthAtRoot: 2,

  nodeId: "FOO~Z_ACME_BAR:42",

  depthAtNode: 1

  },

  function() { /* success handler: access user data */ },

  function(sErrorMessage) { /* failure handler: e.g. display load error */ }

);

What are the following options and where do you maintain them,

1) depthAtRoot:

2) nodeId:

3) depthAtNode:

Where are these maintained?

Any inputs will be appreciated.

Thanks

Sandip