Paste: error() Usage

-- local evade = module.seek("evade")
-- local prediction = module.internal("pred")
-- local targetSelector = module.internal("TS")
-- local orbwalker = module.internal("orb")

local Samaritan = {
   Spell = {},
   Prediction = {},
   Extension = {}
}

-- NOTE: Checks spell is valid
function Samaritan.Spell.IsSpell(spell)
   local result = {value = true, output = nil}
   local validProperties = {"slot", "type", "delay", "width", "range", "speed", "collision"}

   if type(spell) ~= "table" then
      result.value = false
      result.output = "Spell must be table."
      return result
   end

   for _, property in pairs(validProperties) do
      if not spell[property] then
         result.value = false
         result.output = string.format("Spell doesn't have %s property.", property)
         return result
      end
   end

   return result
end

function Samaritan.Spell:Initialize(spell)
   local _ = {}
   setmetatable(_, self)
   self.__index = self

   local isSpell = self.IsSpell(spell)

   if not isSpell.value then
      print(isSpell.output)
      error("bla bla")
   end

   self = spell
   -- print("Spell initialized.")

   return self
end

function Samaritan:Initialize()
   local _ = {}
   setmetatable(_, self)
   self.__index = self

   self.__NAME = "Samaritan"
   self.__VERSION = "0.1a"
   self.__AUTHOR = "Takuma"

   self:PrintLoadMessage()

   return self
end

function Samaritan:PrintLoadMessage()
   local output = string.format("%s loaded v%s by %s.", self.__NAME, self.__VERSION, self.__AUTHOR)
   print(output)
end

local samaritan = Samaritan:Initialize()

local spell =
   samaritan.Spell:Initialize(
   {
      slaot = 0,
      type = "linear",
      delay = 0.25,
      range = 975,
      speed = 1850,
      width = 60,
      collision = {hero = true, minion = true, wall = true}
   }
)

print(spell.width)

return samaritan