code: def _prop_descriptions(self):
      return """\
          arrowlen
              Sets the length (in px) of the links arrow, if 0 no
              arrow will be drawn.
          color
              Sets the `link` color. It can be a single value, or an
              array for specifying color for each `link`. If
              `link.color` is omitted, then by default, a translucent
              grey link will be used.
          colorscales
              A tuple of
              :class:`plotly.graph_objects.sankey.link.Colorscale`
              instances or dicts with compatible properties
          colorscaledefaults
              When used in a template (as
              layout.template.data.sankey.link.colorscaledefaults),
              sets the default property values to use for elements of
              sankey.link.colorscales
          colorsrc
              Sets the source reference on Chart Studio Cloud for
              `color`.
          customdata
              Assigns extra data to each link.
          customdatasrc
              Sets the source reference on Chart Studio Cloud for
              `customdata`.
          hoverinfo
              Determines which trace information appear when hovering
              links. 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.link.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 `source` and `target` are
              node 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 link.
          labelsrc
              Sets the source reference on Chart Studio Cloud for
              `label`.
          line
              :class:`plotly.graph_objects.sankey.link.Line` instance
              or dict with compatible properties
          source
              An integer number `[0..nodes.length - 1]` that
              represents the source node.
          sourcesrc
              Sets the source reference on Chart Studio Cloud for
              `source`.
          target
              An integer number `[0..nodes.length - 1]` that
              represents the target node.
          targetsrc
              Sets the source reference on Chart Studio Cloud for
              `target`.
          value
              A numeric value representing the flow volume value.
          valuesrc
              Sets the source reference on Chart Studio Cloud for
              `value`.
          """
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 41 for calling the Link obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str