code: def _prop_descriptions(self):
      return """\
          color
              Sets the color of the contour lines.
          end
              Sets the end contour level value. Must be more than
              `contours.start`
          highlight
              Determines whether or not contour lines about the z
              dimension are highlighted on hover.
          highlightcolor
              Sets the color of the highlighted contour lines.
          highlightwidth
              Sets the width of the highlighted contour lines.
          project
              :class:`plotly.graph_objects.surface.contours.z.Project
              ` instance or dict with compatible properties
          show
              Determines whether or not contour lines about the z
              dimension are drawn.
          size
              Sets the step between each contour level. Must be
              positive.
          start
              Sets the starting contour level value. Must be less
              than `contours.end`
          usecolormap
              An alternate to "color". Determines whether or not the
              contour lines are colored using the trace "colorscale".
          width
              Sets the width of the contour lines.
          """
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 23 for calling the Z obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str