internal ExecMatcher(T1 item)
{
_item = item;
_actionSelector = new MatchActionSelector <T1>(
x => { throw new NoMatchException($"No match action exists for value of {_item}"); });
}
internal ExecMatcherAfterElse(MatchActionSelector <T1> selector, Action <T1> elseAction, T1 value)
{
_selector = selector;
_elseAction = elseAction;
_value = value;
}