private void UpdatePrevAndNextLinks(IInstruction value)
{
if (value == null)
return;
var prevIndex = this.Index - 1;
if (prevIndex >= 0)
{
var prev = _instructions[prevIndex];
if (prev != null)
prev.SetNext(value);
}
var nextIndex = Index + 1;
if (nextIndex >= _instructions.Count)
return;
var next = _instructions[nextIndex];
if (next != null)
value.SetNext(next);
}