question: public String toString ( ) { StringBuffer sb = new StringBuffer ( ) ; sb . append ( "(" ) ; sb . append ( "timestamp: " + timestamp ) ; List < ? extends Certificate > certs = signerCertPath . getCertificates ( ) ; if ( ! certs . isEmpty ( ) ) { sb . append ( "TSA: " + certs . get ( 0 ) ) ; } else { sb . append ( "TSA: <empty>" ) ; } sb . append ( ")" ) ; return sb . toString ( ) ; }
target:  Returns a string describing this timestamp.