function fit(lines, fitLine, originalLine, textBBox) {
  if (fitLine.length < originalLine.length) {
    var remainder = originalLine.slice(fitLine.length).trim();

    lines.unshift(remainder);
  }

  return {
    width: textBBox.width,
    height: textBBox.height,
    text: fitLine
  };
}
@param {string[]} lines
@param {string} fitLine
@param {string} originalLine
@param {Dimensions} textBBox

@return {LineDescriptor}