diff --git a/ast-generator/src/deserialize.rs b/ast-generator/src/deserialize.rs
index 869a2e7..4c199cd 100644
--- a/ast-generator/src/deserialize.rs
+++ b/ast-generator/src/deserialize.rs
@@ -15,7 +15,7 @@ fn get_vec(vec: &Yaml) -> bool {
     vec.as_bool().unwrap_or_else(|| false)
 }
 
-fn get_vec_child_to_build(build: &Yaml, rule: &str) -> VecChildToBuild {
+fn get_vec_child_to_build(build: &Yaml, name: &str, rule: &str) -> VecChildToBuild {
     if build.is_hash() {
         let build_type = build["build"].as_str().unwrap();
         let var_name = build["var"]
@@ -32,7 +32,7 @@ fn get_vec_child_to_build(build: &Yaml, rule: &str) -> VecChildToBuild {
         let build_as_str = build.as_str().unwrap_or(rule);
         VecChildToBuild::Type(VecTypeChildToBuild::new(
             build_as_str,
-            build_as_str.to_case(Case::Snake).as_str(),
+            name,
             make_build_fn_name(build_as_str).as_str(),
         ))
     }
@@ -42,7 +42,7 @@ fn get_vec_child(name: &str, rule: &str, build: &Yaml) -> ChildSpec {
     ChildSpec::VecChild(VecChild::new(
         name,
         rule,
-        get_vec_child_to_build(build, rule),
+        get_vec_child_to_build(build, name, rule),
     ))
 }
 
@@ -86,10 +86,11 @@ fn get_child_specs(children: &Yaml) -> Vec<ChildSpec> {
         .map(|child_spec| {
             if child_spec.is_hash() {
                 let as_hash = child_spec.as_hash().unwrap();
-                let only_pair = as_hash.iter().next().unwrap();
-
-                let name = only_pair.0.as_str().unwrap();
-                let props = only_pair.1;
+                let (name, props) = as_hash
+                    .iter()
+                    .next()
+                    .map(|(name, props)| (name.as_str().unwrap(), props))
+                    .unwrap();
 
                 let rule = props["rule"].as_str().unwrap();
 
diff --git a/ast-generator/src/type_gen.rs b/ast-generator/src/type_gen.rs
index 4c60280..62f2abb 100644
--- a/ast-generator/src/type_gen.rs
+++ b/ast-generator/src/type_gen.rs
@@ -31,20 +31,25 @@ fn handle_vec_child(
     annotated_members: &mut Vec<TokenStream>,
     accessors: &mut Vec<TokenStream>,
 ) {
-    let (child_ident, child_type_ident) = match vec_child.build() {
+    let (child_ident, child_ident_mut, child_type_ident) = match vec_child.build() {
         VecChildToBuild::Type(vec_type_child) => (
             format_ident!("{}", vec_type_child.var_name()),
+            format_ident!("{}_mut", vec_type_child.var_name()),
             format_ident!("{}", vec_type_child.build()),
         ),
     };
 
     member_names.push(child_ident.clone());
     annotated_members.push(quote! {
-        #child_ident: Vec<#child_type_ident>
+        #child_ident: Vec<Box<#child_type_ident>>
     });
     accessors.push(quote! {
-        pub fn #child_ident(&self) -> &[#child_type_ident] {
-            &self.#child_ident
+        pub fn #child_ident(&self) -> impl Iterator<Item = &#child_type_ident> {
+            self.#child_ident.iter().map(Box::as_ref)
+        }
+
+        pub fn #child_ident_mut(&mut self) -> impl Iterator<Item = &mut #child_type_ident> {
+            self.#child_ident.iter_mut().map(Box::as_mut)
         }
     });
 }
@@ -56,14 +61,19 @@ fn handle_single_type_child(
     accessors: &mut Vec<TokenStream>,
 ) {
     let child_ident = format_ident!("{}", single_type_child.var_name());
+    let child_ident_mut = format_ident!("{}_mut", single_type_child.var_name());
     let child_type_ident = format_ident!("{}", single_type_child.build());
     member_names.push(child_ident.clone());
     annotated_members.push(quote! {
-        #child_ident: #child_type_ident
+        #child_ident: Box<#child_type_ident>
     });
     accessors.push(quote! {
         pub fn #child_ident(&self) -> &#child_type_ident {
-            &self.#child_ident
+            self.#child_ident.as_ref()
+        }
+
+        pub fn #child_ident_mut(&mut self) -> &mut #child_type_ident {
+            self.#child_ident.as_mut()
         }
     });
 }