Implment the chart retrieval for one of chart1, chart2, or chart3 :swidg: The start widget for c :ewidg: The end widget for c :iwidg: The interval widget for c :nwidg: The name widget for c :widg: The QLabel widget for c :c: A string, one of '
(self, swidg, ewidg, iwidg, nwidg, widg, c)
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected