title: Builder and Abstract Factory pattern together
body: <p>How can we use builder and abstract factory pattern together?</p>
  
  <p>Builder pattern is used to instantiate complex objects and abstract factory pattern is used to create group of similar object without requiring the exact classes. </p>
  
  <p>If we want to create complex objects(Builder Pattern) without knowing the exact classes(Abstract factory pattern), then how it is possible ?</p>