class ActiveRecord::ConnectionAdapters::SchemaReflection

def cached?(table_name)
  if @cache.nil?
    # If `check_schema_cache_dump_version` is enabled we can't load
    # the schema cache dump without connecting to the database.
    unless self.class.check_schema_cache_dump_version
      @cache = load_cache(nil)
    end
  end
  @cache&.cached?(table_name)
end