/// <summary>
/// Define the symbol on the current scope.
/// </summary>
/// <param name="symbol"></param>
public void Define(Symbol symbol)
{
_current.Define(symbol);
}
/// <summary>
/// Define the supplied symbol to this instance of symbol table.
/// </summary>
/// <param name="symbol"></param>
public virtual void Define(Symbol symbol)
{
this.Symbols[symbol.Name] = symbol;
}