Updates TODO comment

Author: chalmerlowe

google/cloud/bigquery_v2/services/centralized_service/client.py

@@ -69,6 +69,8 @@ def __init__(
         self._credentials = credentials
         self._client_options = client_options
 
+# --- SERVICE CLIENT ATTRIBUTES ---
+
     @property
     def dataset_service_client(self):
         if "dataset" not in self._clients:
@@ -149,6 +151,16 @@ def model_service_client(self, value):
                 )
         self._clients["model"] = value
 
+# --- SERVICE CLIENT METHODS ---
+# TODO: refactor the microgenerator template so that everything related to 
+#       a single ServiceClient is kept close togetehr in the same section of this class:
+#       @property
+#       @setter
+#       _method_A()
+#       _method_B()
+#       _method_C()
+#       etc
+
     def get_dataset(
         self,
         request: Optional[Union[dataset.GetDatasetRequest, dict]] = None,