How to get symbol ID in Edge

I have some codes like this:

function myFunc(name) {

     var $symbol = sym.$(name);

     //I want to do something with $symbol depending on their id, for example

     //$item.appendTo($symbol);

     //so $item will append to the corresponding symbol

}

for (var i=0; i<10; i++) {

     var symbol = sym.createChildSymbol("MySymbol", sym.$(Stage"));

     myFunc(symbol.getSymbolElement().attr('id')); <--not working

}

I tried .attr('id') and it seems not the id I want. Thanks for help.

EDIT: indeed I want to get the selector inside myFunc