code: def _get_hover_data(self, data, element):
          
          if 'hover' not in self.handles or self.static_source:
              return
  
          for k, v in self.overlay_dims.items():
              dim = util.dimension_sanitizer(k.name)
              if dim not in data:
                  data[dim] = [v for _ in range(len(list(data.values())[0]))]
docs: Initializes hover data based on Element dimension values.