Method _isDrawerOpen

src/material/sidenav/drawer.ts:1069–1071

(drawer: MatDrawer | null)

  }

  private _isDrawerOpen(drawer: MatDrawer | null): drawer is MatDrawer {
    return drawer != null && drawer.opened;
  }

  // Whether argument drawer should have a backdrop when it opens
  private _drawerHasBackdrop(drawer: MatDrawer | null) {