module T::Private::RuntimeLevels

def self.default_checked_level=(default_checked_level)
  if @has_read_default_checked_level
    raise "Set the default checked level earlier. There are already some methods whose sig blocks have evaluated which would not be affected by the new default."
  end
  if !LEVELS.include?(default_checked_level)
    raise "Invalid `checked` level '#{default_checked_level}'. Use one of: #{LEVELS}."
  end
  @default_checked_level = default_checked_level
end