code: public static Delivery.Builder newMail(@NotNull Context ctx){
          // Create a new builder
          Delivery.Builder builder = new Delivery.Builder(ctx);
  
          // Apply defaults if possible
          applyDefaults(builder);
  
          // Return it
          return builder;
      }
docs: Start generating a new 'Mail' object to display a new
  dialog.
  
  @param ctx       the application context
  @return          the Delivery Builder