get the etag value . concode_field_sep String clientRequestId concode_elem_sep String requestId concode_elem_sep String eTag concode_elem_sep DateTimeRfc1123 lastModified concode_field_sep CertificateDeleteHeaders withLastModified concode_elem_sep String clientRequestId concode_elem_sep String requestId concode_elem_sep CertificateDeleteHeaders withClientRequestId concode_elem_sep DateTime lastModified concode_elem_sep CertificateDeleteHeaders withETag concode_elem_sep CertificateDeleteHeaders withRequestId
String function ( ) { return this . eTag ; }