question: private void verifyLegal ( String name ) throws AdeInternalException { if ( m_allKeys == null ) { m_allKeys = new TreeSet < String > ( ) ; } if ( m_allKeys . contains ( name ) ) { throw new AdeInternalException ( "Duplicate statistic " + name ) ; } m_allKeys . add ( name ) ; }
target:  Verify if the given statistic name does not already exists 