def setup_bigrecord_fixtures
return if @bigrecord_fixtures_setup
@bigrecord_fixtures_setup = true
return unless defined?(BigRecord::Base) && !BigRecord::Base.configurations.blank?
if pre_loaded_fixtures && !use_transactional_fixtures
raise RuntimeError, 'pre_loaded_fixtures requires use_transactional_fixtures'
end
@bigrecord_fixture_cache = {}
BigRecordFixtures.reset_cache
@@already_loaded_bigrecord_fixtures[self.class] = nil
load_bigrecord_fixtures
instantiate_fixtures if use_instantiated_fixtures
end