Contains information about a single data series
on a line or scatter graph. Anything that affects
the entire chart should be specified upon creation
of Lines objects. Properties such as line color,
line style, line thickness, and errors in x or y
should be specified here.If a line is given a label
then this label will be used in the chart legend.

Line.defaults shows a list of optional kwargs.

For further documentation see the following:
Lines, Data, and Figures classes
https://github.com/HenryGinn/hgutilities
https://github.com/HenryGinn/hgutilities/tree/main/hgutilities/plotting
https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.plot.html
