Configurable module using closures in Node.js / CommonJS (ie. parametric modules)

some-module.js

module.exports = function(config) {
  return function actualFunctionality(someArgument){
    return doSomethingWith(config).and(someArgument);
  };
}

some-object-module.js

module.exports = function(config) {
  return {
    functionalityOne: function(someArgument) {
      return doSomethingWith(config).and(someArgument);
    },
    functionalityTwo: function(someArgument) {
      return doSomethingElseWith(config).and(someArgument);
    }
  };
}

usage.js

var config = loadConfiguration("config.js");

var someModule = require("./some-module")(config);
var someObjectModule = require("./some-object-module")(config);

someModule("cake");
someObjectModule.functionalityOne("cake");

Can you provide an example of what might be in config.js?