code: def _prop_descriptions(self):
      return """\
          color
              Sets the `node` color. It can be a single value, or an
              array for specifying color for each `node`. If
              `node.color` is omitted, then the default `Plotly`
              color palette will be cycled through to have a variety
              of colors. These defaults are not fully opaque, to
              allow some visibility of what is beneath the node.
          colorsrc
              Sets the source reference on Chart Studio Cloud for
              `color`.
          customdata
              Assigns extra data to each node.
          customdatasrc
              Sets the source reference on Chart Studio Cloud for
              `customdata`.
          groups
              Groups of nodes. Each group is defined by an array with
              the indices of the nodes it contains. Multiple groups
              can be specified.
          hoverinfo
              Determines which trace information appear when hovering
              nodes. If `none` or `skip` are set, no information is
              displayed upon hovering. But, if `none` is set, click
              and hover events are still fired.
          hoverlabel
              :class:`plotly.graph_objects.sankey.node.Hoverlabel`
              instance or dict with compatible properties
          hovertemplate
              Template string used for rendering the information that
              appear on hover box. Note that this will override
              `hoverinfo`. Variables are inserted using %{variable},
              for example "y: %{y}" as well as %{xother}, {%_xother},
              {%_xother_}, {%xother_}. When showing info for several
              points, "xother" will be added to those with different
              x positions from the first point. An underscore before
              or after "(x|y)other" will add a space on that side,
              only when this field is shown. Numbers are formatted
              using d3-format's syntax %{variable:d3-format}, for
              example "Price: %{y:$.2f}".
              https://github.com/d3/d3-format/tree/v1.4.5#d3-format
              for details on the formatting syntax. Dates are
              formatted using d3-time-format's syntax
              %{variable|d3-time-format}, for example "Day:
              %{2019-01-01|%A}". https://github.com/d3/d3-time-
              format/tree/v2.2.3#locale_format for details on the
              date formatting syntax. The variables available in
              `hovertemplate` are the ones emitted as event data
              described at this link
              https://plotly.com/javascript/plotlyjs-events/#event-
              data. Additionally, every attributes that can be
              specified per-point (the ones that are `arrayOk: true`)
              are available.  Variables `sourceLinks` and
              `targetLinks` are arrays of link objects.Finally, the
              template string has access to variables `value` and
              `label`. Anything contained in tag `<extra>` is
              displayed in the secondary box, for example
              "<extra>{fullData.name}</extra>". To hide the secondary
              box completely, use an empty tag `<extra></extra>`.
          hovertemplatesrc
              Sets the source reference on Chart Studio Cloud for
              `hovertemplate`.
          label
              The shown name of the node.
          labelsrc
              Sets the source reference on Chart Studio Cloud for
              `label`.
          line
              :class:`plotly.graph_objects.sankey.node.Line` instance
              or dict with compatible properties
          pad
              Sets the padding (in px) between the `nodes`.
          thickness
              Sets the thickness (in px) of the `nodes`.
          x
              The normalized horizontal position of the node.
          xsrc
              Sets the source reference on Chart Studio Cloud for
              `x`.
          y
              The normalized vertical position of the node.
          ysrc
              Sets the source reference on Chart Studio Cloud for
              `y`.
          """
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 37 for calling the Node obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str