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diff --git a/meta/3rd/OpenResty/library/table.nkeys.lua b/meta/3rd/OpenResty/library/table.nkeys.lua
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+++ b/meta/3rd/OpenResty/library/table.nkeys.lua
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+---@meta
+
+--- Returns the total number of elements in a given Lua table (i.e. from both the
+--- array and hash parts combined).
+---
+--- This API can be JIT compiled.
+---
+--- Usage:
+---
+--- ```lua
+--- local nkeys = require "table.nkeys"
+---
+--- print(nkeys({}))  -- 0
+--- print(nkeys({ "a", nil, "b" }))  -- 2
+--- print(nkeys({ dog = 3, cat = 4, bird = nil }))  -- 2
+--- print(nkeys({ "a", dog = 3, cat = 4 }))  -- 3
+--- ```
+---
+---@param t table
+---@return integer
+local function nkeys(t) end
+
+return nkeys