scalable keyword parameter declaration

keyword_param.rb

class Base
  def xtest(foo:, bar:, **extra)
    puts "base: #{foo}, #{bar}"
  end
end

class Artzt < Base
  def xtest(foo:, bar:, blah:)
    super
    puts "child: #{foo}, #{bar} #{blah}"
  end
end


if __FILE__ == $0
  Artzt.new.xtest(foo: "foo", bar: "bar", blah: "blah")
end