EmptyNext is an implementation of Next that does nothing.

New creates a new DataFlow from the given ChainedCommands.

DataFlow represents a chain of commands where the next command gets executed by the previous one passing on a common object holding the shared state.

Callback represents the interface for the callback functions.

ChainedCommand represents the interface for the callbacks used in a DataFlow.

ErrorCallback represents the interface for the error callback functions.

Next represents the interface for next step in ChainedCommand.