docs: function (srcPath, options) {
          _.defaults(options || (options = {}), DEFAULT_OPTIONS);
          var separator = options.separator;
          var heads = options.heads;
  
          return _.some(_.map(heads, function (head) {
              var reg = new RegExp('^' + head + separator + '.+\\.styl$');
              return reg.test(path.basename(srcPath));
          }));
      }