docstr: Return list of grid lines as a list of paths (list of points).
  
  Parameters
  ----------
  which : {"both", "major", "minor"}
  axis : {"both", "x", "y"}
docstr_tok: ["Return","list","of","grid","lines","as","a","list","of","paths","(","list","of","points",")",".","Parameters","--","--","--","--","--","which",":","{","``","both","''",",","``","major","''",",","``","minor","''","}","axis",":","{","``","both","''",",","``","x","''",",","``","y","''","}"]
code: def get_gridlines(self, which, axis):
      """
      Return list of grid lines as a list of paths (list of points).
  
      Parameters
      ----------
      which : {"both", "major", "minor"}
      axis : {"both", "x", "y"}
      """
      return []
  
imports: import numpy
  import matplotlib
  from matplotlib import _api
  import matplotlib.axes
  from matplotlib.path import Path
  from mpl_toolkits.axes_grid1 import mpl_axes
  from .axisline_style import AxislineStyle
  from .axis_artist import AxisArtist, GridlinesCollection
label_desc: Use image node_id 4 for calling the GridHelperBase obj's underlying member method code with example usage: obj.get_gridlines(which, axis) and returns: list