Interface check for stampit 2

app.js

'use strict';

var stampit = require('stampit');

const MyInterfaceCheckStamp = 
stampit()
  .init(function(stamp) {
    for (var method in stamp.stamp.fixed.methods) {
      var currentMethod = stamp.stamp.fixed.methods[method];

      if (currentMethod.toString().match(/{[\s\n]*}/g) !== null) {
        throw new Error('Method \’' + method.toString() + '\' needs to be implemented.');
      }
    }
  }) 

const MyInterfaceStamp =
stampit()
  .compose(MyInterfaceCheckStamp)
  .methods(
    {
      connect: () => {},
      save: function() {}
    }
  )

const MyImplementationStamp = 
stampit()
  .compose(MyInterfaceStamp)
  .methods(
    {
      connect: () => {
        // implementation
      }
    }
  )

var myImplementationStamp = MyImplementationStamp();