public void AddAbstractClass(ClassDeclarationSyntax syntax)
{
string className = syntax.Identifier.Text;
if (AbstractClasses.ContainsKey(className))
{
throw new ArgumentException($"Abstract Class: {className} already exist.");
}
AbstractClasses.Add(className, syntax);
}
public bool IsAbstractClass(string name) => AbstractClasses.ContainsKey(name);