text: function getUnitProperties(d, prop) {
    var declarationMatchInCss = d.cssRules.matchStyle(prop);
    var declaration = declarationMatchInCss ? declarationMatchInCss.value : d.styles[prop];
    var numberValue = declaration ? declaration.match(regexNumbers) : null;
    if (!numberValue)
      return {
        name: prop,
        value: declaration,
        declaration
      };
    else
      return {
        name: prop,
        value: numberValue[0],
        declaration,
        unit: declaration.replace(numberValue, "")
      }
  }