Add code to test the wasm code path without actually dropping into wasm.

src/wasm/document.rs

@@ -10,11 +10,12 @@ use super::standard_properties::WasmStandardProperties;
 use super::to_wasm::ToWasm;
 use crate::wasm::to_wasm::ToWasmStandardProperties;
 
-#[derive(Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 #[serde(tag = "ast_node")]
 #[serde(rename = "org-data")]
 pub(crate) struct WasmDocument<'s> {
     standard_properties: WasmStandardProperties,
+    additional_properties: Vec<(String, String)>,
     children: Vec<()>,
     phantom: PhantomData<&'s ()>,
 }
@@ -27,6 +28,7 @@ to_wasm!(
     {
         Ok(WasmDocument {
             standard_properties,
+            additional_properties: Vec::new(),
             children: Vec::new(),
             phantom: PhantomData,
         })