docs: public GetDocumentResult withAttachmentsContent(AttachmentContent... attachmentsContent) {
          if (this.attachmentsContent == null) {
              setAttachmentsContent(new com.amazonaws.internal.SdkInternalList<AttachmentContent>(attachmentsContent.length));
          }
          for (AttachmentContent ele : attachmentsContent) {
              this.attachmentsContent.add(ele);
          }
          return this;
      }