mutant.exs

#Add the library to your dependencies
def deps do
  [{:mutant, "~> 0.0.2"}]
end

#create a module and use the Mutant module passing the fields
defmodule MyMutant do
  use Mutant, name: ""
end

#create a new mutant
mutant = MyMutant.new(name: "demo")
#generates a get for the field
MyMutant.get_name(mutant) #=> "demo"
#generates a set for the field
MyMutant.set_name(mutant, "new")
#the state has been changed
MyMutant.get_name(mutant) #=> "new"