diff --git a/apps/showcase/doc/common/apidoc/index.json b/apps/showcase/doc/common/apidoc/index.json
index 8ccd28d42..b82bebe0d 100644
--- a/apps/showcase/doc/common/apidoc/index.json
+++ b/apps/showcase/doc/common/apidoc/index.json
@@ -7847,6 +7847,14 @@
                             "default": "",
                             "description": "Used to pass attributes to the option list's DOM element."
                         },
+                        {
+                            "name": "groupIconContainer",
+                            "optional": true,
+                            "readonly": false,
+                            "type": "CascadeSelectPassThroughOptionType",
+                            "default": "",
+                            "description": "Used to pass attributes to the group icon container's DOM element."
+                        },
                         {
                             "name": "groupIcon",
                             "optional": true,