code: public Email recipient(EmailAddress recipient, RecipientType type) {
  		recipient(new Recipient(recipient, type));
  		return this;
  	}
docs: Add a recipient specifying its address and the type (to, cc, bcc).
  
  @param recipient
  the recipient address
  @param type
  the type (to, cc, bcc)
  @return this instance for fluent chaining