src/third_party/specimenTools/lib/widgets/FeatureDisplay.js
// all features used by the featureItems must be available in the font
all features used by the featureItems must be available in the font
all features used by the featureItems must be available in the font
function filterAvailableFeatureItems(featureItem) {
            var i,l;
            for(i=0,l=featureItem.features.length;i<l;i++)
                if(!availableFeaturesTags.has(featureItem.features[i]))
                    return false;
            return true;
        }
function filterAvailableFeatureItems ( featureItem ) { var i , l ; for ( i = 0 , l = featureItem . features . length ; i < l ; i ++ ) if ( ! availableFeaturesTags . has ( featureItem . features [ i ] ) ) return false ; return true ; }
all features used by the featureItems must be available in the font
all features used by the featureItems must be available in the font