code: def _get_projection(el):
      """
      Get coordinate reference system from non-auxiliary elements.
      Return value is a tuple of a precedence integer and the projection,
      to allow non-auxiliary components to take precedence.
      """
      result = None
      if hasattr(el, "crs"):
          result = (int(el._auxiliary_component), el.crs)
      return result
  
file_path: geoviews/geoviews/plotting/plot.py
imports: import param
  import numpy
  from holoviews.core import CompositeOverlay, Element
  from ..util import project_extents
label_desc: Use image node_id 1 for calling a global function with example usage: _get_projection(el) and returns: result