title: Design pattern to add attributes to objects dynamically
body: <p>Consider that we have a Car object. The <strong>acceleration</strong> and <strong>breaking</strong> features are implemented using <strong>strategy pattern</strong>. But what if we want to <strong>introduce nitro gas feature to an existing car object</strong> ? What is the design pattern that I can use  ? </p>
  
  <p>I want to add the nitro feature(Attribute) after creating the car object. </p>