class_docstr: Scatter3D is a 3D element representing the position of a collection
  of coordinates in a 3D space. The key dimensions represent the
  position of each coordinate along the x-, y- and z-axis.
  
  Scatter3D is not available for the default Bokeh backend.
  
  Example - Matplotlib
  --------------------
  
  .. code-block::
  
      import holoviews as hv
      from bokeh.sampledata.iris import flowers
  
      hv.extension("matplotlib")
  
      hv.Scatter3D(
          flowers, kdims=["sepal_length", "sepal_width", "petal_length"]
      ).opts(
          color="petal_width",
          alpha=0.7,
          size=5,
          cmap="fire",
          marker='^'
      )
  
  Example - Plotly
  ----------------
  
  .. code-block::
  
      import holoviews as hv
      from bokeh.sampledata.iris import flowers
  
      hv.extension("plotly")
  
      hv.Scatter3D(
          flowers, kdims=["sepal_length", "sepal_width", "petal_length"]
      ).opts(
          color="petal_width",
          alpha=0.7,
          size=5,
          cmap="Portland",
          colorbar=True,
          marker="circle",
      )
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code: def __getitem__(self, slc):
      return Points.__getitem__(self, slc)
  
imports: import param
  from ..core import Dimension, Element3D
  from .geom import Points
  from .path import Path
  from .raster import Image
label_desc: Use image node_id 1 for calling the Scatter3D obj's underlying member method code with example usage: obj.__getitem__(slc) and returns: Points