local _lua_setmetatable = setmetatable
Stack = {}
--- @generic T
--- @class Stack<T> : {
--- Pop: (fun(self: Stack<T>): T),
--- Peek: (fun(self: Stack<T>): T),
--- Push: (fun(self: Stack<T>, value: T): Stack<T>),
--- }
--- @field protected _stack any[]
--- @field protected _count integer
Stack.__index = {}
--- Creates a new, empty stack.
--- @generic T
--- @return Stack<T>
function Stack.New()
 local this = {
 _stack = {},
 _count = 0,
 }
 return _lua_setmetatable(this, Stack)
end
local st = Stack.New() --[[@as Stack<{ num: integer }>]]
local a = st:Peek()
local b = st:Pop()
local c = st:Push({})