code: def mock_debian(tmpdir):
      """A fake Debian multi-install system"""
      tmpdir.ensure("share/gdal/3.3/header.dxf")
      tmpdir.ensure("share/gdal/3.4/header.dxf")
      tmpdir.ensure("share/gdal/3.5/header.dxf")
      tmpdir.ensure("share/gdal/3.6/header.dxf")
      tmpdir.ensure(
          f"share/gdal/{gdal_version.major}.{gdal_version.minor}/header.dxf"
      )
      tmpdir.ensure("share/proj/epsg")
      return tmpdir
  
imports: import pytest
  from rasterio._env import GDALDataFinder, PROJDataFinder, get_proj_data_search_paths, get_gdal_data
  from .conftest import gdal_version
label_desc: Use image node_id 3 for calling a global function with example usage: mock_debian(tmpdir) and returns: tmpdir