message: Checked for nulls
  The parse methods don't consistently return unset - one does and one doesn't
diff: @@ -47,9 +47,7 @@ public class CollapsingBarView extends CollapsingToolbarLayout {
  void styleTitle() {
  if (titleFontChanged) {
  - int fontWeight = ReactTypefaceUtils.parseFontWeight(titleFontWeight);
  - int fontStyle = ReactTypefaceUtils.parseFontStyle(titleFontStyle);
  - if (titleFontFamily != null || fontWeight != ReactTypefaceUtils.UNSET || fontStyle != ReactTypefaceUtils.UNSET) {
  + if (titleFontFamily != null || titleFontWeight != null || titleFontStyle != null) {
  setCollapsedTitleTypeface(ReactTypefaceUtils.applyStyles(defaultCollapsedTitleTypeface, ReactTypefaceUtils.parseFontStyle(titleFontStyle), ReactTypefaceUtils.parseFontWeight(titleFontWeight), titleFontFamily, getContext().getAssets()));
  setExpandedTitleTypeface(ReactTypefaceUtils.applyStyles(defaultExpandedTitleTypeface, ReactTypefaceUtils.parseFontStyle(titleFontStyle), ReactTypefaceUtils.parseFontWeight(titleFontWeight), titleFontFamily, getContext().getAssets()));
  } else {
  