public void setTextDelegate(@SuppressWarnings("NullableProblems") TextDelegate textDelegate) {
    this.textDelegate = textDelegate;
  }
Set a map from font name keys to Typefaces.
The keys can be in the form:
* fontFamily
* fontFamily-fontStyle
* fontName
All 3 are defined as fName, fFamily, and fStyle in the Lottie file.
<p>
If you change a value in fontMap, create a new map or call
{@link #invalidateSelf()}. Setting the same map again will noop.
lottie/src/main/java/com/airbnb/lottie/LottieDrawable.java