void WarnIfActionRoutineDiffers([NotNull] Syntax line, [NotNull] string description,
[CanBeNull] ZilAtom thisRoutineName, [CanBeNull] ZilAtom lastRoutineName)
{
if (thisRoutineName != lastRoutineName)
{
Context.HandleError(new CompilerError(line.SourceLine,
CompilerMessages._0_Mismatch_For_1_Using_2_As_Before,
description,
line.ActionName,
lastRoutineName?.ToString() ?? "no " + description));
}
}