question: public void freeEntry ( BasicPoolEntry entry ) { if ( numEntries < 1 ) { throw new IllegalStateException ( "No entry created for this pool. " + route ) ; } if ( numEntries <= freeEntries . size ( ) ) { throw new IllegalStateException ( "No entry allocated from this pool. " + route ) ; } freeEntries . add ( entry ) ; }
target:  Returns an allocated entry to this pool.