docstr: foreign key constraints always have names in the DB
docstr_tok: ["foreign","key","constraints","always","have","names","in","the","DB"]
code: def fk_names(self):
      """foreign key constraints always have names in the DB"""
      return exclusions.fails_on("sqlite")
  
imports: from sqlalchemy import exc
  from sqlalchemy import Index
  from sqlalchemy import text
  from alembic.testing import exclusions
  from alembic.testing.requirements import SuiteRequirements
  from alembic.util import compat
  from alembic.util import sqla_compat
label_desc: Use image node_id 9 for calling the DefaultRequirements obj's underlying member method code with example usage: obj.fk_names() and returns: exclusions