question: public void delete ( String name ) throws IOException { if ( name . equalsIgnoreCase ( DESCRIPTIONS ) ) { accessDescriptions = Collections . < AccessDescription > emptyList ( ) ; } else { throw new IOException ( "Attribute name [" + name + "] not recognized by " + "CertAttrSet:SubjectInfoAccessExtension." ) ; } encodeThis ( ) ; }
target:  Delete the attribute value.