Using the plot function of pandas, how to set the font size of title?

use pandas"s plot function to draw:
df.plot (title=" title", fontsize=20)
where the fontsize parameter can only adjust the font size of the x-axis and y-axis. (the official website explains: Font size for xticks and yticks), how can I adjust the font size of title?

Jun.10,2021

fig = df.plot(title='', fontsize=20)
fig.axes.title.set_size(20)
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