public static IEnumerable <IParameterSymbol> OverriddenAndImplementedInterfaceMembers(this IParameterSymbol @this)
{
if (@this == null)
{
throw new ArgumentNullException(nameof(@this));
}
var result = new List <IParameterSymbol>();
var overridden = @this.OverriddenMember();
if (overridden != null)
{
result.Add(overridden);
result.AddRange(OverriddenAndImplementedInterfaceMembers(overridden));
}
result.AddRange(@this.ImplementedInterfaceMembers());
return(result);
}