code: @NonNull
      public EmailIntentBuilder bcc(@NonNull String bcc) {
          checkEmail(bcc);
          this.bcc.add(bcc);
          return this;
      }
docs: Add an email address to be used in the "bcc" field.
  
  @param bcc
  the email address to add
  
  @return This {@code EmailIntentBuilder} for method chaining