MagicDraw/Cameo: If the underlying Parameter of an InputPin or OutputPin on a CallBehaviorAction or CallOperationAction is set to streaming, the indicator {stream} optionally displays on the Pin
A decisionInput Behavior has no out parameters, no inout parameters, and one return parameter. Source Unified Modeling Language 2.5.1
incoming_control_one_input_parameter If the DecisionNode has a decisionInputFlow and an incoming ControlFlow, then any decisionInput Behavior has one in Parameter ... Source Unified Modeling Language 2.5.1
zero_input_parameters If the DecisionNode has no decisionInputFlow and an incoming ControlFlow, then any decisionInput Behavior has no in parameters. Source Unified Modeling Language 2.5.1