Create a render ast node type.

src/intermediate/object.rs

@@ -30,7 +30,7 @@ use super::verbatim::IVerbatim;
 use super::ITarget;
 use futures::future::{BoxFuture, FutureExt};
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub(crate) enum IObject {
     Bold(IBold),
     Italic(IItalic),