gistfile1.rb

############# THIS IS WITHIN THE LIBRARY #############

class Foo
  def initialize(a, b, c, opts={})
    #do some stuff
  end
end

######################################################

######### THIS IS WHAT I WANT TO DO ##################

class Bar < Foo
  def initialize(newparam, a, b, c, opts{})
    #do some more stuff
    super(pass original params up)
  end
end