docstr: Extract first and second value from tuples of mapped bins.
code: def _get_bounds(mapper, values):
      """
      Extract first and second value from tuples of mapped bins.
      """
  
      array = np.array([mapper.get(x) for x in values])
      return array[:, 0], array[:, 1]
  
imports: import numpy
  import param
  from bokeh.models.glyphs import AnnularWedge
  from ...core.data import GridInterface
  from ...core.spaces import HoloMap
  from ...core.util import dimension_sanitizer, is_nan
  from .element import ColorbarPlot, CompositeElementPlot
  from .selection import BokehOverlaySelectionDisplay
  from .styles import base_properties, fill_properties, line_properties, text_properties
label_desc: Use image node_id 3 for calling the RadialHeatMapPlot obj's underlying member method code with example usage: obj._get_bounds(mapper, values) and returns: array,  array