code: def fill_zero(
      x=None,
      y=None,
      label=None,
      color=None,
      width=None,
      dash=None,
      opacity=None,
      mode='lines+markers',
      **kargs
  ):
      
      return line(
          x=x,
          y=y,
          label=label,
          color=color,
          width=width,
          dash=dash,
          opacity=opacity,
          mode=mode,
          fill='tozeroy',
          **kargs
      )
docs: Fill to zero.
  
      Parameters
      ----------
      x : array-like, optional
      y : TODO, optional
      label : TODO, optional
  
      Returns
      -------
      Chart