code: def get_gdal_options(opts, is_remote=False):
      
      user_opts = {} if opts is None else dict(**opts)
      if is_remote:
          return dict(GDAL_HTTP_OPTS, **user_opts)
      else:
          return user_opts
docs: Return a merged set of custom and default GDAL/rasterio Env options.
  
      If is_remote is set to True, the default GDAL_HTTP_OPTS are appended.
  
      Parameters
      ----------
      opts : dict or None
          Explicit GDAL options.
      is_remote : bool
          Indicate whether Env is for a remote file.
  
      Returns
      -------
      dictionary