diff --git a/codegen/src/generator.rs b/codegen/src/generator.rs
index f4bd05a..00cf6ff 100644
--- a/codegen/src/generator.rs
+++ b/codegen/src/generator.rs
@@ -256,6 +256,14 @@ fn write_message(msg_proto: &DescriptorProto, output: &mut String) {
         };
 
         if *f_label == 3 {
+            output.push_str(&format!(
+                "    pub fn {}(&self) -> {} {{\n",
+                safe_name, rust_type
+            ));
+            output.push_str(&format!(
+                "        match (self.{}_start, self.{}_end) {{\n",
+                field_name, field_name
+            ));
             if *is_map {
                 output.push_str(&format!("            (Some(start), Some(end)) => roto_runtime::MapFieldIterator::new(self.accessor.iter_repeated_range({}, start, end)),\n", tag));
                 output.push_str(&format!(