src/elements/Placeholder/PlaceholderLine.js
function PlaceholderLine(props) {
  const { className, length } = props
  const classes = cx('line', length, className)
  const rest = getUnhandledProps(PlaceholderLine, props)
  const ElementType = getElementType(PlaceholderLine, props)

  return <ElementType {...rest} className={classes} />
}
function PlaceholderLine(props) {
  const { className, length } = props
  const classes = cx('line', length, className)
  const rest = getUnhandledProps(PlaceholderLine, props)
  const ElementType = getElementType(PlaceholderLine, props)

  return <ElementType {...rest} className={classes} />
}
A placeholder can contain have lines of text.