Element instance, specified by a
systemcomposer.analysis.ArchitectureInstance
,
systemcomposer.analysis.ComponentInstance
,
systemcomposer.analysis.PortInstance
, or
systemcomposer.analysis.ConnectorInstance
object. This function is
part of the instance API that you can use to analyze the model iteratively, element by
element.instance
refers to the element instance on which the
iteration is being performed.