code: def get_backend_requires_fast(backend, dist, config_settings=None):
      if backend is None or isinstance(backend, str):
          try:
              backend = build_backend(backend)
          except ImportError:
              return None
      requires = []
      get_requires = getattr(
          backend, f"get_requires_for_build_{dist}", None
      )
      if get_requires is not None:
          requires += get_requires(config_settings)
      return requires
  
file_path: mpi4py/conf/builder.py
imports: import contextlib
  import importlib
  import os
  import shutil
  import sys
label_desc: Use image node_id 4 for calling a global function with example usage: get_backend_requires_fast(backend, dist, config_settings) and returns: requires, None