code: def _check_dep(nibabel="2.1.0", dipy="0.10.1"):
      """Check dependencies."""
      for lib, ver in zip(["nibabel", "dipy"], [nibabel, dipy]):
          passed = True if not ver else check_version(lib, ver)
  
          if not passed:
              raise ImportError(
                  "%s %s or higher must be correctly "
                  "installed and accessible from Python" % (lib, ver)
              )
  
imports: import copy
  import os.path
  import warnings
  import numpy
  from scipy import sparse
  from .fixes import _get_img_fdata
  from .morph_map import read_morph_map
  from .parallel import parallel_func
  from .source_estimate import _BaseSourceEstimate, _BaseSurfaceSourceEstimate, _BaseVolSourceEstimate, _get_ico_tris
  from .source_space._source_space import SourceSpaces, _ensure_src, _grid_interp
  from .surface import _compute_nearest, mesh_edges, read_surface
  from .utils import BunchConst, ProgressBar, _check_fname, _check_option, _custom_lru_cache, _ensure_int, _import_h5io_funcs, _import_nibabel, _validate_type, check_version, fill_doc, get_subjects_dir, logger, use_log_level, verbose, warn
  from .utils import warn
label_desc: Use image node_id 8 for calling a global function with example usage: _check_dep(nibabel, dipy) without return types