changesSince = "Changes since ...";
} else if (_request.parameters().hasParameter(RequestParameter.ParameterPreviousVersion)) {
previousVersion = "Previous version";
} else {
RequestParameterVersion versionParameter = RequestParameter.versionParameter(_request.parameters().get(RequestParameter.ParameterVersion));
if (versionParameter.versionAll()) {
fullHistory = "Full history";
} else if (versionParameter.versionChangesSince()) {
changesSince = changesSince + "<br/>" + _request.versionIndex().getByNumber(((RequestParameterVersionChanges)versionParameter).versionNumber()).name();
} else if (versionParameter.versionCurrent()) {
currentVersion = "Current version";