1 files changed, 9 insertions, 0 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CustomType.py b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CustomType.py
index 5be6155b84..f75a85dc27 100644
--- a/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CustomType.py
+++ b/third_party/rust/uniffi_bindgen/src/bindings/python/templates/CustomType.py
@@ -18,6 +18,10 @@ class _UniffiConverterType{{ name }}:
         return {{ builtin|ffi_converter_name }}.lift(value)
 
     @staticmethod
+    def check_lower(value):
+        return {{ builtin|ffi_converter_name }}.check_lower(value)
+
+    @staticmethod
     def lower(value):
         return {{ builtin|ffi_converter_name }}.lower(value)
 
@@ -52,6 +56,11 @@ class _UniffiConverterType{{ name }}:
         return {{ config.into_custom.render("builtin_value") }}
 
     @staticmethod
+    def check_lower(value):
+        builtin_value = {{ config.from_custom.render("value") }}
+        return {{ builtin|check_lower_fn }}(builtin_value)
+
+    @staticmethod
     def lower(value):
         builtin_value = {{ config.from_custom.render("value") }}
         return {{ builtin|lower_fn }}(builtin_value)