var Sntp = require('../lib');
  
  // Request offset once
  
  Sntp.offset(function (err, offset) {
  
      console.log(offset);                    // New (served fresh)
  
      // Request offset again
  
      Sntp.offset(function (err, offset) {
  
          console.log(offset);                // Identical (served from cache)
      });
  });