Definition of the Task Container 
Use
This function is used to process the container elements of the
task container. Each task container already contains the workflow system elements and any additional elements for the method parameters of the referenced object method.You have to
add additional elements to the task container if:Values are assigned to the task container at runtime in the following ways:
Initial values are overwritten by bindings. Initial value assignment and processing of the task container are only possible during definition of the single-step task.