text: import {MemoryCache} from './index'
  
  let cache = new MemoryCache();
  cache.set('key1', 'value1');
  cache.set('key2', 'value2', 1000);
  cache.set('key3', 'value3', 2000, function(key) {
      console.log(`Removed entry for ${key}`);
  });
  
  console.log(`Size: ${cache.Size}`);
  let value1 = cache.get('key1');
  console.log(`Value 1: ${value1}`);
  setTimeout(function(){
      let value2 = cache.get('key2');
      console.log(`Value 2: ${value2}`);
  }, 1050);
  cache.remove('key1');
  console.log(`Cache contains Key1? ${cache.contains('key1')}`);
  cache.clear();