code: def __init__(self, hmap, **params):
      super().__init__(hmap, **params)
      self._legend_plot = None
  
imports: import sys
  import numpy
  import param
  from bokeh.models import CustomJSHover, DatetimeAxis
  from ...core.util import cartesian_product, dimension_sanitizer, isfinite
  from ...element import Raster
  from ..util import categorical_legend
  from .chart import PointPlot
  from .element import ColorbarPlot, LegendPlot
  from .selection import BokehOverlaySelectionDisplay
  from .styles import base_properties, fill_properties, line_properties, mpl_to_bokeh
  from .util import bokeh33, bokeh34, colormesh
label_desc: Use image node_id 1 to create a new RGBPlot object from inherited base classes: LegendPlot with example: obj = RGBPlot(hmap)