docs: def setup(use_latex=False, overwrite=False):
      """Set up matplotlib imports and settings.
  
      Parameters
      ----------
      use_latex: bool, optional
          Determine if Latex output should be used. Latex will only be enable if
          a 'latex' binary is found in the system.
      overwrite: bool, optional
          Overwrite some matplotlib config values.
  
      Returns
      -------
      plt: :mod:`pylab`
          pylab module imported as plt
      mpl: :mod:`matplotlib`
          matplotlib module imported as mpl
      """
      # just make sure we can access matplotlib as mpl
      import matplotlib as mpl
  
      # general settings
      if overwrite:
          mpl.rcParams["lines.linewidth"] = 2.0
          mpl.rcParams["lines.markeredgewidth"] = 3.0
          mpl.rcParams["lines.markersize"] = 3.0
          mpl.rcParams["font.size"] = 12
          mpl.rcParams['mathtext.default'] = 'regular'
      if latex and use_latex:
          mpl.rcParams['text.usetex'] = True
  
          mpl.rc(
              'text.latex',
              preamble=''.join((
                  #         r'\usepackage{droidsans}
                  r'\usepackage[T1]{fontenc} ',
                  r'\usepackage{sfmath} \renewcommand{\rmfamily}{\sffamily}',
                  r'\renewcommand\familydefault{\sfdefault} ',
                  r'\usepackage{mathastext} '
              ))
          )
      else:
          mpl.rcParams['text.usetex'] = False
  
      import matplotlib.pyplot as plt
      return plt, mpl