Make FlexContainer be default-accessed

DEVSIX-5169

Autoported commit.
Original commit hash: [7939d2a3e]

Author: ars18wrw

itext.tests/itext.layout.tests/itext/layout/FlexContainerTest.cs renamed to itext.tests/itext.layout.tests/itext/layout/element/FlexContainerTest.cs

@@ -28,13 +28,13 @@ You should have received a copy of the GNU Affero General Public License
 using iText.Kernel.Colors;
 using iText.Kernel.Pdf;
 using iText.Kernel.Utils;
+using iText.Layout;
 using iText.Layout.Borders;
-using iText.Layout.Element;
 using iText.Layout.Properties;
 using iText.Test;
 using iText.Test.Attributes;
 
-namespace iText.Layout {
+namespace iText.Layout.Element {
     [NUnit.Framework.TestFixtureSource("AlignItemsAndJustifyContentPropertiesTestFixtureData")]
     public class FlexContainerTest : ExtendedITextTest {
         public static readonly String sourceFolder = iText.Test.TestUtil.GetParentProjectDirectory(NUnit.Framework.TestContext

itext/itext.layout/itext/layout/element/FlexContainer.cs

@@ -43,7 +43,7 @@ source product.
 using iText.Layout.Renderer;
 
 namespace iText.Layout.Element {
-    public class FlexContainer : Div {
+    internal class FlexContainer : Div {
         public FlexContainer()
             : base() {
         }

port-hash

@@ -1 +1 @@
-20a73e3e8cd223bca411d62b4420115265218873
+7939d2a3e4ca14ffa02a31d3a9f9bf8abd365cb3