DifferentialController.php
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			<?php

			abstract class DifferentialController extends PhabricatorController {

			public function buildApplicationCrumbs() {
			$crumbs = parent::buildApplicationCrumbs();

			$crumbs->addAction(
			id(new PHUIListItemView())
			->setHref($this->getApplicationURI('/diff/create/'))
			->setName(pht('Create Diff'))
			->setIcon('fa-plus-square'));

			return $crumbs;
			}

			public function buildSideNavView($for_app = false) {
			$viewer = $this->getRequest()->getUser();

			$nav = new AphrontSideNavFilterView();
			$nav->setBaseURI(new PhutilURI($this->getApplicationURI()));

			id(new DifferentialRevisionSearchEngine())
			->setViewer($viewer)
			->addNavigationItems($nav->getMenu());

			$nav->selectFilter(null);

			return $nav;
			}

			public function buildApplicationMenu() {
			return $this->buildSideNavView(true)->getMenu();
			}

			}

phab/src/applications/differential/controller/DifferentialController.phpb2f3001ec4beproduction