docs: def set_fig_title(self, title, **kwargs):
          """Set overall figure title.
  
          Set title for overall figure. This is not for a specific plot.
          It will place the title at the top of the figure with a call to ``fig.suptitle``.
  
          Args:
              title (str): Figure title.
  
          Keywork Arguments:
              x/y (float, optional): The x/y location of the text in figure coordinates.
                  Defaults are 0.5 for x and 0.98 for y.
              horizontalalignment/ha (str, optional): The horizontal alignment of
                  the text relative to (x, y). Optionas are 'center', 'left', or 'right'.
                  Default is 'center'.
              verticalalignment/va (str, optional): The vertical alignment of the text
                  relative to (x, y). Optionas are 'top', 'center', 'bottom',
                  or 'baseline'. Default is 'top'.
              fontsize/size (int, optional): The font size of the text. Default is 20.
  
          """
          prop_default = {
              'fontsize': 20,
          }
  
          for prop, default in prop_default.items():
              kwargs[prop] = kwargs.get(prop, default)
  
          self.figure.fig_title = title
          self.figure.fig_title_kwargs = kwargs
          return