     // MARK: Init
     
     public required init?(coder aDecoder: NSCoder) {
-        fatalError("Use init(for:viewController:) - TabmanNavigationBar does not support Interface Builder")
-    }
-    
-    /// Create a navigation bar.
-    ///
-    /// - Parameter bar: Bar to embed in the navigation bar.
+        fatalError("Use init(for:viewController:)")
+    }
+    
+    /// Create a system bar.
+    ///
+    /// - Parameter bar: Bar to embed in the system bar.
     public required init(for bar: TMBar) {
         self.bar = bar
         super.init(frame: .zero)

            return
        }
        guard let viewController = nextViewControllerInResponderChain() else {
            fatalError("TMNavigationBar could not find view controller to use for layout guides.")
        }
        hasExtendedEdges = true
        viewController.view.layoutIfNeeded()

            backgroundView.style = backgroundStyle
        }
    }
    /// Color of the separator at the bottom of the system bar.
    ///
    /// Defaults to `UIColor.white.withAlphaComponent(0.5)`.
    public var separatorColor: UIColor = UIColor.white.withAlphaComponent(0.5) {
