function _cmdSetRequestFilterPaths(root, paths) {
    var pathKey = getPathKey(root),
        rewritePaths = {};

    // reset list of filtered paths for each call to setRequestFilterPaths
    _rewritePaths[pathKey] = rewritePaths;

    paths.forEach(function (path) {
        rewritePaths[path] = pathJoin(root, path);
    });
}
@private
Defines a set of paths from a server's root path to watch and fire "request" events for.

@param {string} path The absolute path whose server we should watch
@param {Array.<string>} paths An array of root-relative paths to watch.
    Each path should begin with a forward slash "/".