---@class druid.widget: druid.base_component
---@field druid druid_instance Ready to use druid instance
---@field root node

---@class GUITextMetrics
---@field width number
---@field height number
---@field max_ascent number
---@field max_descent number

---@class utf8
---@field len fun(s: string):number
---@field sub fun(s: string, start_index: number, length: number)
---@field reverse fun()
---@field char fun()
---@field unicode fun()
---@field gensub fun()
---@field byte fun()
---@field find fun()
---@field match fun(s: string, m: string)
---@field gmatch fun(s: string, m: string)
---@field gsub fun()
---@field dump fun()
---@field format fun()
---@field lower fun()
---@field upper fun()
---@field rep fun()