module Geocoder::Lookup

def instantiate_lookup(name)
  class_name = "Geocoder::Lookup::#{classify_name(name)}"
  begin
    Geocoder::Lookup.const_get(class_name)
  rescue NameError
    require "geocoder/lookups/#{name}"
  end
  Geocoder::Lookup.const_get(class_name).new
end