question: public Object produceEvent ( ) throws InvocationTargetException { if ( ! valid ) { throw new IllegalStateException ( toString ( ) + " has been invalidated and can no longer produce events." ) ; } try { return method . invoke ( target ) ; } catch ( IllegalAccessException e ) { throw new AssertionError ( e ) ; } catch ( InvocationTargetException e ) { if ( e . getCause ( ) instanceof Error ) { throw ( Error ) e . getCause ( ) ; } throw e ; } }
target:  Invokes the wrapped producer method.