Add a function for getting language config by injection layer

helix-core/src/syntax.rs

@@ -1345,6 +1345,13 @@ pub fn highlight_iter<'a>(
         result
     }
 
+    /// Gets the [LanguageConfiguration] for a given injection layer.
+    pub fn layer_config(&self, layer_id: LayerId) -> &Arc<LanguageConfiguration> {
+        let language_id = self.layers[layer_id].config.language_id;
+
+        &self.loader.language_configs[language_id]
+    }
+
     // Commenting
     // comment_strings_for_pos
     // is_commented