Implementation of a common processing object (node).
Classes
| ChainNode(nodes, **kwargs) | Chain of nodes. |
| ClassWithCollections([descr]) | Base class for objects which contain any known collection Classes inherited from this class gain ability to access collections and their items as simple attributes. |
| ConditionalAttribute([enabled]) | Simple container intended to conditionally store the value .. |
| Node([space, postproc]) | Common processing object. |