docstr: Initialize the plotly components that will represent the element
  
  Parameters
  ----------
  datum: dict
      An element of the data list returned by the get_data method
  options: dict
      Graph options that were returned by the graph_options method
  index: int
      Index of datum in the original list returned by the get_data method
  
  Returns
  -------
  dict
      Dictionary of the plotly components that represent the element.
      Keys may include:
       - 'traces': List of trace dicts
       - 'annotations': List of annotations dicts
       - 'images': List of image dicts
       - 'shapes': List of shape dicts
code: def init_graph(self, datum, options, index=0, **kwargs):
      """
      Initialize the plotly components that will represent the element
  
      Parameters
      ----------
      datum: dict
          An element of the data list returned by the get_data method
      options: dict
          Graph options that were returned by the graph_options method
      index: int
          Index of datum in the original list returned by the get_data method
  
      Returns
      -------
      dict
          Dictionary of the plotly components that represent the element.
          Keys may include:
           - 'traces': List of trace dicts
           - 'annotations': List of annotations dicts
           - 'images': List of image dicts
           - 'shapes': List of shape dicts
      """
      trace = dict(options)
      for k, v in datum.items():
          if k in trace and isinstance(trace[k], dict):
              trace[k].update(v)
          else:
              trace[k] = v
  
      if self._style_key and self._per_trace:
          vectorized = {
              k: v
              for k, v in options[self._style_key].items()
              if isinstance(v, np.ndarray)
          }
          trace[self._style_key] = dict(trace[self._style_key])
          for s, val in vectorized.items():
              trace[self._style_key][s] = val[index]
      return {"traces": [trace]}
  
imports: import re
  import uuid
  import numpy
  import param
  from ...None import Tiles
  from ...core import util
  from ...core.element import Element
  from ...core.spaces import DynamicMap
  from ...streams import Stream
  from ...util.transform import dim
  from ..plot import GenericElementPlot, GenericOverlayPlot
  from ..util import dim_range_key
  from .plot import PlotlyPlot
  from .util import STYLE_ALIASES, get_colorscale, legend_trace_types, merge_figure, merge_layout
label_desc: Use image node_id 6 for calling the ElementPlot obj's underlying member method code with example usage: obj.init_graph(datum, options, index) and returns: dict