function printTable(t, indent)
  if not indent then
    indent = ""
    world.logInfo("Printing table...")
  end
  local tnames = {}
  for k,v in pairs(t) do
    tnames[#tnames + 1] = k
  end
  table.sort(tnames, function(a, b) return a < b end)
  for _, key in ipairs(tnames) do
    if type(t[key]) == "table" then
      world.logInfo(indent.."table "..key)
      printTable(t[key], indent.."  ")
    elseif type(t[key]) == "function" then
      world.logInfo(indent.."function "..key)
    else
      world.logInfo(indent..type(t[key]).." "..key.." = %s", t[key])
    end
  end
end