Add conversion to WasmAstNode for wasm Objects.

src/wasm/paragraph.rs

@@ -22,9 +22,19 @@ to_wasm!(
     wasm_context,
     standard_properties,
     {
+        let children = original
+            .children
+            .iter()
+            .map(|child| {
+                child
+                    .to_wasm(wasm_context.clone())
+                    .map(Into::<WasmAstNode<'_, '_>>::into)
+            })
+            .collect::<Result<Vec<_>, _>>()?;
+
         Ok(WasmParagraph {
             standard_properties,
-            children: Vec::new(),
+            children,
         })
     }
 );