question: public boolean checkStationaryFunctionValue ( final double fxOld , final double fxNew , final int statStateIterations , final Type ecType ) { if ( Math . abs ( fxNew - fxOld ) >= functionEpsilon_ ) { this . statStateIterations = 0 ; return false ; } this . statStateIterations ++ ; if ( statStateIterations <= maxStationaryStateIterations_ ) return false ; this . ecType = Type . StationaryFunctionValue ; return true ; }
target:  Test if the function variation is below functionEpsilon