164     public static Builder newBuilder() {

   164     public static Builder newBuilder() {

   165         return new HttpClientBuilderImpl();

   165         return new HttpClientBuilderImpl();

   166     }

   166     }

   167 

   167 

   168     /**

   168     /**

   170      *

   170      *

   171      * <p> Builders are created by invoking {@link HttpClient#newBuilder()

   171      * <p> Builders are created by invoking {@link HttpClient#newBuilder()

   172      * newBuilder}. Each of the setter methods modifies the state of the builder

   172      * newBuilder}. Each of the setter methods modifies the state of the builder

   173      * and returns the same instance. Builders are not thread-safe and should not be

   173      * and returns the same instance. Builders are not thread-safe and should not be

   174      * used concurrently from multiple threads without external synchronization.

   174      * used concurrently from multiple threads without external synchronization.