Implement a wrapper type for AST nodes.

This is to make it impossible to have a collision for attribute names that are real attributes vs attributes I've added for structure (like children and ast_node).

src/wasm/ast_node.rs

@@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use serde::Serialize;
 
 use super::angle_link::WasmAngleLink;
@@ -58,6 +60,34 @@ use super::timestamp::WasmTimestamp;
 use super::underline::WasmUnderline;
 use super::verbatim::WasmVerbatim;
 use super::verse_block::WasmVerseBlock;
+use super::WasmStandardProperties;
+
+#[derive(Debug, Serialize)]
+pub(crate) struct WasmAstWrapper<'b, 's, 'p, I> {
+    #[serde(rename = "ast-node")]
+    pub(crate) ast_node: Cow<'s, str>,
+    #[serde(rename = "standard-properties")]
+    pub(crate) standard_properties: &'b WasmStandardProperties,
+    #[serde(rename = "properties")]
+    pub(crate) inner: I,
+    pub(crate) children: &'b Vec<WasmAstNode<'s, 'p>>,
+}
+
+impl<'b, 's, 'p, I> WasmAstWrapper<'b, 's, 'p, I> {
+    pub(crate) fn new(
+        ast_node: Cow<'s, str>,
+        standard_properties: &'b WasmStandardProperties,
+        inner: I,
+        children: &'b Vec<WasmAstNode<'s, 'p>>,
+    ) -> WasmAstWrapper<'b, 's, 'p, I> {
+        WasmAstWrapper {
+            ast_node,
+            standard_properties,
+            inner,
+            children,
+        }
+    }
+}
 
 #[derive(Debug, Serialize)]
 #[serde(untagged)]