public void Test()
{
// find required item by toggle object
var item = TestAccordion.Items.Find(x => x.ToggleObject == ToggleGameObject);
// or content object
//var item = TestAccordion.Items.Find(x => x.ContentObject==ContentGameObject);
// or get item by index
//var item = TestAccordion.Items[0];
// and expand item
TestAccordion.Open(item);
//TestAccordion.Close(item);
//TestAccordion.ToggleItem(item);
}