MyMutator = MyMutator or class(BaseMutator)
...
MyMutator.texture = -- For custom texture (required dimensions: 128x128)
{ -- If "custom" is set to true, path is following Mutator mod path
    path = "guis/textures/MyMutatorTexture", -- Write here your custom texture here or use already one in the game
    custom = true -- If your texture is custom (eg. new), set this to true
    x = 0, -- If you use a texture from the game, make sure you also set these 4 variables
    y = 0, -- They are not used, if "custom" is set to true
    h = 0,
    w = 0
}
MyMutator.localization = -- Useful if you are adding 2 or more mutators in one mod. Use this in your every mutator if you want differenciate mutator's language file.
{
    path = "MyMutator" -- ModPath .. "MyMutator/"
}

function MyMutator:setup() -- Optional
end

function MyMutator:init_finalize() -- Called by GameSetup; Optional
end

function MyMutator:init_finalize_setup() -- Called by Setup; Optional
end

if not MutatorHelper then return end
MutatorHelper:AddMutator(MyMutator, ModPath)

if not MutatorHelper then return end -- Adds custom category to the Mutator screen
MutatorHelper:AddCategory("crime_spree", { string = "menu_gamemode_spree", path = ModPath })