+ Important: see Stage API (stageapi.py) and IO Control API
+ (iocontrol.py) in combination with below. This module
+ "combines" the Stage API with the IO Control API to create
+ the Pipeline API.
+
+ The one critically important key difference between StageAPI and
+ PipelineAPI:
+
+ * StageAPI: combinatorial (NO REGISTERS / LATCHES PERMITTED)
+ * PipelineAPI: synchronous registers / latches get added here