diff --git a/openedx/core/djangoapps/xblock/runtime/learning_core_runtime.py b/openedx/core/djangoapps/xblock/runtime/learning_core_runtime.py
index 9715231a64bd..0942a5a8b3c7 100644
--- a/openedx/core/djangoapps/xblock/runtime/learning_core_runtime.py
+++ b/openedx/core/djangoapps/xblock/runtime/learning_core_runtime.py
@@ -331,6 +331,12 @@ def _get_component_from_usage_key(self, usage_key):
         return component
 
     def _get_component_version_from_block(self, block):
+        """
+        Given an XBlock instance, return the Learning Core ComponentVersion.
+
+        This relies on our runtime setting the _runtime_requested_version
+        attribute on blocks that it fetches.
+        """
         usage_key = block.usage_key
         component = self._get_component_from_usage_key(usage_key)
 
@@ -345,6 +351,12 @@ def _get_component_version_from_block(self, block):
         return component_version
 
     def _absolute_url_for_asset(self, component_version, asset_path):
+        """
+        The full URL for a specific library asset in a ComponentVersion.
+
+        This does not check for whether the path actually exists–it just returns
+        where it would be if it did exist.
+        """
         # This function should return absolute URLs, so we need the site root.
         site_root_url = get_xblock_app_config().get_site_root_url()