public void GetParent()
{
var idt = new SymbolTable();
FullSymbol da = FullSymbol.Create(idt, @"c.a");
FullSymbol parent = da.GetParent(idt);
XAssert.AreEqual(@"c", parent.ToString(idt));
da = FullSymbol.Create(idt, @"c.a.b");
parent = da.GetParent(idt);
XAssert.AreEqual(@"c.a", parent.ToString(idt));
}