code: public static QuasiNewtonBFGS_to_UnconstrainedMinimization quasiNewtonBfgs(@Nullable ConfigQuasiNewton config ) {
  		if( config == null )
  			config = new ConfigQuasiNewton();
  
  		LineSearch lineSearch;
  		switch( config.lineSearch ) {
  			case FLETCHER86:
  				LineSearchFletcher86 fletcher86 = new LineSearchFletcher86();
  				fletcher86.setConvergence(config.line_ftol,config.line_gtol);
  				lineSearch = fletcher86;
  				break;
  
  			case MORE94:
  				LineSearchMore94 more94 = new LineSearchMore94();
  				more94.setConvergence(config.line_ftol,config.line_gtol,0.1);
  				lineSearch = more94;
  				break;
  
  			default:
  				throw new RuntimeException("Unknown line search. "+config.lineSearch);
  		}
  
  		QuasiNewtonBFGS qn = new QuasiNewtonBFGS(lineSearch);
  		return new QuasiNewtonBFGS_to_UnconstrainedMinimization(qn);
  	}
docs: Returns an implementation of {@link QuasiNewtonBFGS} with {@link LineSearchMore94} for the internal line search.
  This is a specific implementation of {@link UnconstrainedMinimization} and allows full access to all
  tuning parameters.
  
  @return UnconstrainedMinimization