exists

Check if timer established with specified ID

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timer.exists( timer_id )

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fields	type	description
timer_id	string	The identifier of the timer

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fields	type	description
	bool	true if timer is established, false otherwise

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					-- module.lua

local timer = require("timer")

if timer.exists("timer_id") then
    print("timer exist")
else
    print("timer does not exist")
end