function makeRelative(paths) {
        var fullPath = _testWindow.brackets.test.ProjectManager.getProjectRoot().fullPath,
            fullPathLength = fullPath.length;

        function removeProjectPath(path) {
            if (path.indexOf(fullPath) === 0) {
                return path.substring(fullPathLength);
            }

            return path;
        }

        if (Array.isArray(paths)) {
            return paths.map(removeProjectPath);
        } else {
            return removeProjectPath(paths);
        }
    }
Creates relative paths based on the test window's current project. Any paths,
outside the project are included in the result, but left as absolute paths.
@param {!Array.<string>|string} paths Absolute file path(s) to convert. May pass a single string path or array.
@return {!Array.<string>|string} Relative file path(s)