d_Control or  d_control2

A Control is a stereotyped Object that models a controlling entity or manager. A Control organizes and schedules other activities and elements, typically in Analysis (including Robustness), Sequence and Communication diagrams. It is the controller of the Model-View-Controller pattern.

You can also create a Control as a stereotyped Class. See the Create a Control Element topic.

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e_Control   or   e_Control2