def generic_find_fk_constraint_names(table, columns, referenced, insp):
    """Utility to find foreign-key constraint names in alembic migrations"""
    names = set()
    for fk in insp.get_foreign_keys(table):
        if fk['referred_table'] == referenced and set(fk['referred_columns']
            ) == columns:
            names.add(fk['name'])
    return names
