code: def _prop_descriptions(self):
      return """\
          align
              Sets the horizontal alignment of the text content
              within hover label box. Has an effect only if the hover
              label text spans more two or more lines
          alignsrc
              Sets the source reference on Chart Studio Cloud for
              `align`.
          bgcolor
              Sets the background color of the hover labels for this
              trace
          bgcolorsrc
              Sets the source reference on Chart Studio Cloud for
              `bgcolor`.
          bordercolor
              Sets the border color of the hover labels for this
              trace.
          bordercolorsrc
              Sets the source reference on Chart Studio Cloud for
              `bordercolor`.
          font
              Sets the font used in hover labels.
          namelength
              Sets the default length (in number of characters) of
              the trace name in the hover labels for all traces. -1
              shows the whole name regardless of length. 0-3 shows
              the first 0-3 characters, and an integer >3 will show
              the whole name if it is less than that many characters,
              but if it is longer, will truncate to `namelength - 3`
              characters and add an ellipsis.
          namelengthsrc
              Sets the source reference on Chart Studio Cloud for
              `namelength`.
          split
              Show hover information (open, close, high, low) in
              separate labels.
          """
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 21 for calling the Hoverlabel obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str