function getLineHeight(style) {
  if ('fontSize' in style && 'lineHeight' in style) {
    return style.lineHeight * parseInt(style.fontSize, 10);
  }
}
Creates and returns a label and its bounding box.

@param {string} text the text to render on the label
@param {TextLayoutConfig} options

@return { {
  element: SVGElement,
  dimensions: Dimensions
} }