Class used to describe an information element which is displayed below feeders, which contains one or more of the following:
an arrow whose direction is specified
a string on its right
a string on its left
Each of these three element part is optional
A LegBusSet contains the set of BusNodes that shall be vertically presented, and the cells that have a pattern of
connection included in the busNodeSet.
PositionByClustering finds adequate positions for the busBars with the following principles:
All the connections to the BusBar of the leg of an ExternCell, or each leg of an InternCell shall be stackable
(ie could be displayed with disconnectors to busbar vertically aligned).
This class builds the connectivity among the elements of a voltageLevel
buildGraphAndDetectCell establishes the List of nodes, edges and nodeBuses
cells is built by the PatternCellDetector Class