code: function interpolatedOptions(options, context, source, hierarchy = '') {
              Object.keys(options).forEach((key) => {
                if (typeof options[key] === 'object') {
                  interpolatedOptions(options[key], context, source, `${hierarchy}.${key}`);
                }
                else if (typeof options[key] === 'string' && shouldPatchProperty(`${hierarchy}.${key}`)) {
                  options[key] = utils.interpolateName(context, options[key], { content: source });
                }
              });
              return options;
            }
docs: Interpolating all the string values in the options object.