local json = require "json"
local helpers = require("./helpers")
-- A counter.
local Counter = {}
Counter.__index = Counter
function Counter.new()
return setmetatable({ n = 0 }, Counter)
end
-- Adds two numbers.
local function add(a, b)
return a + b
end
function Counter:increment()
self.n = self.n + 1
end
local MAX_RETRIES = 3