public ToStringHelper addValue(float value) {
      return addHolder(String.valueOf(value));
    }
Adds an unnamed value to the formatted output.

<p>It is strongly encouraged to use {@link #add(String, float)} instead and give value a
readable name.

@since 18.0 (since 11.0 as {@code Objects.ToStringHelper.addValue()}).
fbcore/src/main/java/com/facebook/common/internal/Objects.java