let args =
        parse_macro_input!(args with Punctuated::<MetaNameValue, syn::Token![,]>::parse_terminated);

    let node_types_path: String = args
        .iter()
        .find(|attr| attr.path.is_ident("node_types_path"))
        .and_then(|option| {
            if let MetaNameValue {
                value:
                    Expr::Lit(syn::ExprLit {
                        lit: Lit::Str(value),
                        ..
                    }),
                ..
            } = option
            {
                Some(value.value())
            } else {
                None
            }
        })
        .expect("node_types_path must be a string literal");