code: public EntityBuilder addActions(List<Action> actions) {
      	if(actions == null) {
      		throw new IllegalArgumentException("actions cannot be null.");
      	}
          for (Action action : actions) {
              addAction(action);
          }
          return this;
      }
docs: Add a list of actions to the entity to be built. Actions are options according to the Siren specification.
  @param actions cannot be <code>null</code>, may be empty.
  @return <code>this</code> builder, never <code>null</code>.