Move group parsing out of ParseBuffer impl
diff --git a/src/lib.rs b/src/lib.rs
index 1d6c60c..0209fb8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -311,9 +311,11 @@
 #[macro_use]
 mod macros;
 
+// Not public API.
 #[cfg(feature = "parsing")]
+#[doc(hidden)]
 #[macro_use]
-mod group;
+pub mod group;
 
 #[macro_use]
 pub mod token;