class_docstr: Base class used as parent for the concrete LI reader classes.
class_docstr_tok: ["Base","class","used","as","parent","for","the","concrete","LI","reader","classes","."]
docstr: Retrieve a variable that should be used as reference during a transform.
docstr_tok: ["Retrieve","a","variable","that","should","be","used","as","reference","during","a","transform","."]
code: def get_transform_reference(self, transform_name, ds_info):
      """Retrieve a variable that should be used as reference during a transform."""
      var_path = ds_info[transform_name]
  
      if "{sector_name}" in var_path:
          # We really expect to have a sector name for that variable:
          var_path = var_path.replace(
              "{sector_name}", ds_info["sector_name"]
          )
  
      # get the variable on that path:
      ref_var = self.get_measured_variable(var_path)
  
      return ref_var
  
imports: import logging
  import re
  import dask.array
  import netCDF4
  import numpy
  import xarray
  from pyproj import Proj
  from satpy.readers.netcdf_utils import NetCDF4FileHandler
label_desc: Use image node_id 32 for calling the LINCFileHandler obj's underlying member method code with example usage: obj.get_transform_reference(transform_name, ds_info) and returns: ref_var