docs: function create(opts) {
          var suite = Suite.create(suites[0], opts.title);
          suite.pending = Boolean(opts.pending);
          suite.file = opts.file;
          suites.unshift(suite);
          if (opts.isOnly) {
            suite.parent._onlySuites = suite.parent._onlySuites.concat(suite);
            mocha.options.hasOnly = true;
          }
          if (typeof opts.fn === 'function') {
            opts.fn.call(suite);
            suites.shift();
          } else if (typeof opts.fn === 'undefined' && !suite.pending) {
            throw new Error('Suite "' + suite.fullTitle() + '" was defined but no callback was supplied. Supply a callback or explicitly skip the suite.');
          }
  
          return suite;
        }