@staticmethod
  def zipsafe(dist):
    # zip-safety is only an attribute of eggs.  wheels are considered never
    # zip safe per implications of PEP 427.
    if hasattr(dist, 'egg_info') and dist.egg_info.endswith('EGG-INFO'):
      egg_metadata = dist.metadata_listdir('')
      return 'zip-safe' in egg_metadata and 'native_libs.txt' not in egg_metadata
    else:
      return False
Harness to test if the FrameSet.fromIterable call works properly.
dataset/ETHPy150Open pantsbuild/pex/pex/util.py/DistributionHelper.zipsafe--crossover with--dataset/ETHPy150Open sqlboy/fileseq/test/run.py/TestFrameSet._check_fromIterable