public TextLayoutBuilder setLineHeight(float lineHeight) {
    if (mParams.lineHeight != lineHeight) {
      mParams.lineHeight = lineHeight;
      mParams.spacingAdd = lineHeight - mParams.paint.getFontMetrics(null);
      mParams.spacingMult = 1.0f;
      mSavedLayout = null;
    }
    return this;
  }
Sets the line height for this layout.

<p>This mimics the behavior of
https://developer.android.com/reference/android/widget/TextView.html#setLineHeight(int) and
should not be used with {@link TextLayoutBuilder#setTextSpacingExtra(float)} or {@link
TextLayoutBuilder#setTextSpacingMultiplier(float)}.

@param lineHeight the line height between two lines of text in px.
@return This {@link TextLayoutBuilder} instance.
library/src/main/java/com/facebook/fbui/textlayoutbuilder/TextLayoutBuilder.java