text: /**~action~
   * SequenceNode [Class]
   * 
   * Description
   * 
   * A SequenceNode is a StructuredActivityNode
   * that executes a sequence of ExecutableNodes in order.
   * 
   * Diagrams
   * 
   * Generalizations
   * 
   * StructuredActivityNode
   * 
   * Association Ends
   * 
   *  ♦ executableNode : ExecutableNode [0..*]
   * {ordered, redefines StructuredActivityNode::node}
   * (opposite
   * A_executableNode_sequenceNode::sequenceNode)
   * 
   * The ordered set of ExecutableNodes to be sequenced.
  **/