question: private boolean validateStartIp ( Set ipSet ) throws PolicyException { if ( ipSet . size ( ) != 1 ) { String args [ ] = { START_IP } ; throw new PolicyException ( ResBundleUtils . rbName , "multiple_values_not_allowed_for_property" , args , null ) ; } Iterator startIpIter = ipSet . iterator ( ) ; try { String startIpString = ( String ) startIpIter . next ( ) ; startIp = stringToIp ( startIpString ) ; } catch ( ClassCastException ce ) { String args [ ] = { START_IP } ; throw new PolicyException ( ResBundleUtils . rbName , "property_is_not_a_String" , args , ce ) ; } return true ; }
target:  validates if the value of property START_IP is correct and adheres to the expected format