question

You can't use the same code as array labels because bundles don't have labels. They behave more like tables, so yes you can use the Table API to get and set data on a bundle.

If you have a node in the Tools folder with bundle data on it, you can access a value on that bundle using something like the following:

Table bundle = model().find("Tools/Bundle"); //Casts the bundle data to a Table
double value = bundle[1][2]; //Row 1, column 2
string strValue = bundle[2][1]; //Row 2, column 1

To set the data on a bundle, use the same syntax:

bundle[1][2] = 5.34;
bundle[1][2] = "My String";

You can also access columns by their names:

double value = bundle[1]["Col 1"];
bundle[1]["Col 1"] = 35.4;

If you want to put it all into one line, it would look like this:

model().find("Tools/Bundle").as(Table)[1][2] = 35.2;
double value = model().find("Tools/Bundle").as(Table)[1][2];

Keep in mind that when using the Table API, the data is one based, not 0 based as was the old bundle commands.