code: def _all_dialect_packages(self):
      return [
          getattr(__import__("sqlalchemy.dialects.%s" % d).dialects, d)
          for d in dialects.__all__
          if not d.startswith("_")
      ]
  
imports: from sqlalchemy import dialects
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing import is_not
label_desc: Use image node_id 1 for calling the ImportStarTest obj's underlying member method code with example usage: obj._all_dialect_packages() and returns: unknown