@SuppressWarnings("unused") public void setDefaultFontFileExtension(String defaultFontFileExtension) {
    this.defaultFontFileExtension = defaultFontFileExtension;
  }
Sets the default file extension (include the `.`).
<p>
e.g. `.ttf` `.otf`
<p>
Defaults to `.ttf`
lottie/src/main/java/com/airbnb/lottie/manager/FontAssetManager.java