code: def _prop_descriptions(self):
      return """\
          autocolorscale
              Determines whether the colorscale is a default palette
              (`autocolorscale: true`) or the palette determined by
              `line.colorscale`. Has an effect only if in
              `line.color`is set to a numerical array. In case
              `colorscale` is unspecified or `autocolorscale` is
              true, the default  palette will be chosen according to
              whether numbers in the `color` array are all positive,
              all negative or mixed.
          cauto
              Determines whether or not the color domain is computed
              with respect to the input data (here in `line.color`)
              or the bounds set in `line.cmin` and `line.cmax`  Has
              an effect only if in `line.color`is set to a numerical
              array. Defaults to `false` when `line.cmin` and
              `line.cmax` are set by the user.
          cmax
              Sets the upper bound of the color domain. Has an effect
              only if in `line.color`is set to a numerical array.
              Value should have the same units as in `line.color` and
              if set, `line.cmin` must be set as well.
          cmid
              Sets the mid-point of the color domain by scaling
              `line.cmin` and/or `line.cmax` to be equidistant to
              this point. Has an effect only if in `line.color`is set
              to a numerical array. Value should have the same units
              as in `line.color`. Has no effect when `line.cauto` is
              `false`.
          cmin
              Sets the lower bound of the color domain. Has an effect
              only if in `line.color`is set to a numerical array.
              Value should have the same units as in `line.color` and
              if set, `line.cmax` must be set as well.
          color
              Sets thelinecolor. It accepts either a specific color
              or an array of numbers that are mapped to the
              colorscale relative to the max and min values of the
              array or relative to `line.cmin` and `line.cmax` if
              set.
          coloraxis
              Sets a reference to a shared color axis. References to
              these shared color axes are "coloraxis", "coloraxis2",
              "coloraxis3", etc. Settings for these shared color axes
              are set in the layout, under `layout.coloraxis`,
              `layout.coloraxis2`, etc. Note that multiple color
              scales can be linked to the same color axis.
          colorbar
              :class:`plotly.graph_objects.scatter3d.line.ColorBar`
              instance or dict with compatible properties
          colorscale
              Sets the colorscale. Has an effect only if in
              `line.color`is set to a numerical array. The colorscale
              must be an array containing arrays mapping a normalized
              value to an rgb, rgba, hex, hsl, hsv, or named color
              string. At minimum, a mapping for the lowest (0) and
              highest (1) values are required. For example, `[[0,
              'rgb(0,0,255)'], [1, 'rgb(255,0,0)']]`. To control the
              bounds of the colorscale in color space, use`line.cmin`
              and `line.cmax`. Alternatively, `colorscale` may be a
              palette name string of the following list: Greys,YlGnBu
              ,Greens,YlOrRd,Bluered,RdBu,Reds,Blues,Picnic,Rainbow,P
              ortland,Jet,Hot,Blackbody,Earth,Electric,Viridis,Cividi
              s.
          colorsrc
              Sets the source reference on Chart Studio Cloud for
              color .
          dash
              Sets the dash style of the lines.
          reversescale
              Reverses the color mapping if true. Has an effect only
              if in `line.color`is set to a numerical array. If true,
              `line.cmin` will correspond to the last color in the
              array and `line.cmax` will correspond to the first
              color.
          showscale
              Determines whether or not a colorbar is displayed for
              this trace. Has an effect only if in `line.color`is set
              to a numerical array.
          width
              Sets the line width (in px).
          """
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 29 for calling the Line obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str