class_docstr: Guide colorbar
  
  Parameters
  ----------
  barwidth : float, default=None
      Width (in pixels) of the colorbar. If `None`, the
      [](`~plotnine.themes.themeable.legend_key_width`) is
      used. The value is multiplied by `1.45`.
  barheight : float, default=None
      Height (in pixels) of the colorbar.
      [](`~plotnine.themes.themeable.legend_key_height`) is
      used. The value is multiplied by `5 * 1.45`.
  nbin : int, default=20
      Number of bins for drawing a colorbar. A larger value yields
      a smoother colorbar
  raster : bool, default=False
      Whether to render the colorbar as a raster object.
  ticks : bool, default=True
      Whether tick marks on colorbar should be visible.
  draw_ulim : bool, default=True
      Whether to show the upper limit tick marks.
  draw_llim : bool, default=True
      Whether to show the lower limit tick marks.
  direction : Literal["horizontal", "vertical"], default="horizontal"
      Direction of the guide.
  kwargs : dict
      Parameters passed on to :class:`.guide`
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docstr: Simply discards the other guide
docstr_tok: ["Simply","discards","the","other","guide"]
code: def merge(self, other):
      """
      Simply discards the other guide
      """
      return self
  
imports: from __future__ import annotations
  import hashlib
  import typing
  from warnings import warn
  import numpy
  import pandas
  from mizani.bounds import rescale
  from ..exceptions import PlotnineWarning
  from ..mapping.aes import rename_aesthetics
  from ..scales.scale_continuous import scale_continuous
  from .guide import guide
label_desc: Use image node_id 2 for calling the guide_colorbar obj's underlying member method code with example usage: obj.merge(other) and returns: self