code: def _compute_ticks(self, element, ranges):
      return None, None
  
imports: import sys
  import numpy
  import param
  from packaging.version import Version
  from ...core import CompositeOverlay, Element, traversal
  from ...core.util import isfinite, match_spec, max_range, unique_iterator
  from ...element.raster import RGB, Image, Raster
  from ..util import categorical_legend
  from .chart import PointPlot
  from .element import ColorbarPlot, ElementPlot, LegendPlot, OverlayPlot
  from .plot import GridPlot, MPLPlot, mpl_rc_context
  from .util import get_raster_array, mpl_version
label_desc: Use image node_id 2 for calling the RasterBasePlot obj's underlying member method code with example usage: obj._compute_ticks(element, ranges) and returns: None,  None