seen = seen or {}
  if seen[obj] then return seen[obj] end
  seen[obj] = result
    result[deepcopy(k, seen)] = deepcopy(v, seen)
  end
  return result
end
function minmax(a, b)
  return math.min(a,b), math.max(a,b)
end
  for k,v in pairs(obj) do
  local result = setmetatable({}, getmetatable(obj))

  local info = debug.getinfo(stack_frame_index, 'Sl')
  local msg
  if type(obj) == 'string' then
    msg = obj
  else
    msg = json.encode(obj)
  end
  love.filesystem.append('log', info.short_src..':'..info.currentline..': '..msg..'\n')
  if stack_frame_index == nil then
    stack_frame_index = 3
  end
  -- I'd like to use the unicode character \u{250c} here, but it doesn't work
  -- in OpenBSD.
  log(stack_frame_index, '[ u250c ' .. name)
  if stack_frame_index == nil then
    stack_frame_index = 3
  end
  -- I'd like to use the unicode character \u{2518} here, but it doesn't work
  -- in OpenBSD.
  log(stack_frame_index, '] u2518 ' .. name)
  if stack_frame_index == nil then
    stack_frame_index = 4
  end
  log_end(name, stack_frame_index)
  log_start(name, stack_frame_index)
end
end
function log_new(name, stack_frame_index)
end
function log_end(name, stack_frame_index)
end
-- for section delimiters we'll use specific Unicode box characters
function log_start(name, stack_frame_index)