/// <summary>
/// Identifier name include variable name.
/// </summary>
/// <param name="expression"></param>
/// <param name="state"></param>
/// <returns></returns>
private VariableState VisitIdentifierName(IdentifierNameSyntax expression, ExecutionState state)
{
var value = ResolveIdentifier(expression.Identifier);
return(state.GetValueByIdentifier(value));
}
