diff --git a/adev/src/content/cdk/_build-info.json b/adev/src/content/cdk/_build-info.json
index 8a73179d8d6..dd14234c3ba 100644
--- a/adev/src/content/cdk/_build-info.json
+++ b/adev/src/content/cdk/_build-info.json
@@ -1,4 +1,4 @@
 {
   "branchName": "refs/heads/21.0.x",
-  "sha": "f6ac1da38b8d3f1f52df5c78162b3303bf82c413"
+  "sha": "21d4a3f8b6fbf58c471b0df00da53736580fcc59"
 }
\ No newline at end of file
diff --git a/adev/src/content/cdk/cdk_drag_drop.json b/adev/src/content/cdk/cdk_drag_drop.json
index ab08834866e..1229e8849b3 100755
--- a/adev/src/content/cdk/cdk_drag_drop.json
+++ b/adev/src/content/cdk/cdk_drag_drop.json
@@ -135,7 +135,6 @@
     },
     {
       "name": "CdkDragStart",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -164,6 +163,7 @@
       "description": "Event emitted when the user starts dragging a draggable.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user starts dragging a draggable. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -246,7 +246,6 @@
     },
     {
       "name": "CdkDragRelease",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -275,6 +274,7 @@
       "description": "Event emitted when the user releases an item, before any animations have started.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user releases an item, before any animations have started. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -923,7 +923,6 @@
     },
     {
       "name": "CdkDragEnd",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -968,6 +967,7 @@
       "description": "Event emitted when the user stops dragging a draggable.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user stops dragging a draggable. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -977,7 +977,6 @@
     },
     {
       "name": "DragDropConfig",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -1136,7 +1135,9 @@
       "description": "Object that can be used to configure the drag\nitems and drop lists within a module or a component.",
       "jsdocTags": [],
       "rawComment": "/**\n * Object that can be used to configure the drag\n * items and drop lists within a module or a component.\n */",
-      "extends": "Partial<DragRefConfig>",
+      "extends": [
+        "Partial<DragRefConfig>"
+      ],
       "implements": [],
       "source": {
         "filePath": "src/cdk/drag-drop/directives/config.ts",
@@ -1604,7 +1605,6 @@
     },
     {
       "name": "DragRefConfig",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -1648,6 +1648,7 @@
       "description": "Object that can be used to configure the behavior of DragRef.",
       "jsdocTags": [],
       "rawComment": "/** Object that can be used to configure the behavior of DragRef. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-ref.ts",
@@ -2400,7 +2401,6 @@
     },
     {
       "name": "CdkDragEnter",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -2441,6 +2441,7 @@
       "description": "Event emitted when the user moves an item into a new drop container.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user moves an item into a new drop container. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -2605,7 +2606,6 @@
     },
     {
       "name": "CdkDragExit",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -2638,6 +2638,7 @@
       "description": "Event emitted when the user removes an item from a\ndrop container by moving it into another one.",
       "jsdocTags": [],
       "rawComment": "/**\n * Event emitted when the user removes an item from a\n * drop container by moving it into another one.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -4571,7 +4572,6 @@
     },
     {
       "name": "CdkDragDrop",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4663,6 +4663,7 @@
       "description": "Event emitted when the user drops a draggable item inside a drop container.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user drops a draggable item inside a drop container. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -4672,7 +4673,6 @@
     },
     {
       "name": "CdkDragMove",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4725,6 +4725,7 @@
       "description": "Event emitted as the user is dragging a draggable item.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted as the user is dragging a draggable item. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
@@ -4734,7 +4735,6 @@
     },
     {
       "name": "Point",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4758,6 +4758,7 @@
       "description": "Point on the page or within an element.",
       "jsdocTags": [],
       "rawComment": "/** Point on the page or within an element. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-ref.ts",
@@ -4781,7 +4782,6 @@
     },
     {
       "name": "CdkDragSortEvent",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4830,6 +4830,7 @@
       "description": "Event emitted when the user swaps the position of two drag items.",
       "jsdocTags": [],
       "rawComment": "/** Event emitted when the user swaps the position of two drag items. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/drag-drop/drag-events.ts",
diff --git a/adev/src/content/cdk/cdk_testing.json b/adev/src/content/cdk/cdk_testing.json
index 7bb7b34e088..8ed2effeb2e 100755
--- a/adev/src/content/cdk/cdk_testing.json
+++ b/adev/src/content/cdk/cdk_testing.json
@@ -57,7 +57,6 @@
     },
     {
       "name": "ElementDimensions",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -97,6 +96,7 @@
       "description": "Dimensions for element size and its position relative to the viewport.",
       "jsdocTags": [],
       "rawComment": "/**\n * Dimensions for element size and its position relative to the viewport.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/element-dimensions.ts",
@@ -106,7 +106,6 @@
     },
     {
       "name": "AutoChangeDetectionStatus",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -132,6 +131,7 @@
       "description": "The status of the test harness auto change detection. If not diabled test harnesses will\nautomatically trigger change detection after every action (such as a click) and before every read\n(such as getting the text of an element).",
       "jsdocTags": [],
       "rawComment": "/**\n * The status of the test harness auto change detection. If not diabled test harnesses will\n * automatically trigger change detection after every action (such as a click) and before every read\n * (such as getting the text of an element).\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "src/cdk/testing/change-detection.ts",
@@ -141,7 +141,6 @@
     },
     {
       "name": "ModifierKeys",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -189,6 +188,7 @@
       "description": "Modifier keys that may be held while typing.",
       "jsdocTags": [],
       "rawComment": "/** Modifier keys that may be held while typing. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/test-element.ts",
@@ -2402,7 +2402,6 @@
     },
     {
       "name": "TestElement",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -3177,6 +3176,7 @@
       "description": "This acts as a common interface for DOM elements across both unit and e2e tests. It is the\ninterface through which the ComponentHarness interacts with the component's DOM.",
       "jsdocTags": [],
       "rawComment": "/**\n * This acts as a common interface for DOM elements across both unit and e2e tests. It is the\n * interface through which the ComponentHarness interacts with the component's DOM.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/test-element.ts",
@@ -3222,7 +3222,6 @@
     },
     {
       "name": "HarnessLoader",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -3675,6 +3674,7 @@
       "description": "Interface used to load ComponentHarness objects. This interface is used by test authors to\ninstantiate `ComponentHarness`es.",
       "jsdocTags": [],
       "rawComment": "/**\n * Interface used to load ComponentHarness objects. This interface is used by test authors to\n * instantiate `ComponentHarness`es.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "src/cdk/testing/component-harness.ts",
@@ -4016,7 +4016,6 @@
     },
     {
       "name": "TextOptions",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4034,6 +4033,7 @@
       "description": "Options that affect the text returned by `TestElement.text`.",
       "jsdocTags": [],
       "rawComment": "/**\n * Options that affect the text returned by `TestElement.text`.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/test-element.ts",
@@ -4043,7 +4043,6 @@
     },
     {
       "name": "LocatorFactory",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -4458,6 +4457,7 @@
       "description": "Interface used to create asynchronous locator functions used find elements and component\nharnesses. This interface is used by `ComponentHarness` authors to create locator functions for\ntheir `ComponentHarness` subclass.",
       "jsdocTags": [],
       "rawComment": "/**\n * Interface used to create asynchronous locator functions used find elements and component\n * harnesses. This interface is used by `ComponentHarness` authors to create locator functions for\n * their `ComponentHarness` subclass.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "src/cdk/testing/component-harness.ts",
@@ -6112,7 +6112,6 @@
     },
     {
       "name": "ComponentHarnessConstructor",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -6133,6 +6132,7 @@
       "description": "Constructor for a ComponentHarness subclass. To be a valid ComponentHarnessConstructor, the\nclass must also have a static `hostSelector` property.",
       "jsdocTags": [],
       "rawComment": "/**\n * Constructor for a ComponentHarness subclass. To be a valid ComponentHarnessConstructor, the\n * class must also have a static `hostSelector` property.\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "src/cdk/testing/component-harness.ts",
@@ -6142,7 +6142,6 @@
     },
     {
       "name": "BaseHarnessFilters",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -6170,6 +6169,7 @@
       "description": "A set of criteria that can be used to filter a list of `ComponentHarness` instances.",
       "jsdocTags": [],
       "rawComment": "/** A set of criteria that can be used to filter a list of `ComponentHarness` instances. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "src/cdk/testing/component-harness.ts",
diff --git a/adev/src/content/cdk/cdk_testing_protractor.json b/adev/src/content/cdk/cdk_testing_protractor.json
index 14092633311..0682308049a 100755
--- a/adev/src/content/cdk/cdk_testing_protractor.json
+++ b/adev/src/content/cdk/cdk_testing_protractor.json
@@ -6,7 +6,6 @@
   "entries": [
     {
       "name": "ProtractorHarnessEnvironmentOptions",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -31,6 +30,7 @@
         }
       ],
       "rawComment": "/**\n * Options to configure the environment.\n * @deprecated\n * @breaking-change 13.0.0\n */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/protractor/protractor-harness-environment.ts",
diff --git a/adev/src/content/cdk/cdk_testing_selenium_webdriver.json b/adev/src/content/cdk/cdk_testing_selenium_webdriver.json
index 4172de1849f..d7d83e46ce6 100755
--- a/adev/src/content/cdk/cdk_testing_selenium_webdriver.json
+++ b/adev/src/content/cdk/cdk_testing_selenium_webdriver.json
@@ -1123,7 +1123,6 @@
     },
     {
       "name": "WebDriverHarnessEnvironmentOptions",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -1139,6 +1138,7 @@
       "description": "Options to configure the environment.",
       "jsdocTags": [],
       "rawComment": "/** Options to configure the environment. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/selenium-webdriver/selenium-web-driver-harness-environment.ts",
diff --git a/adev/src/content/cdk/cdk_testing_testbed.json b/adev/src/content/cdk/cdk_testing_testbed.json
index 7bc9402dd5d..0995bf2ee9f 100755
--- a/adev/src/content/cdk/cdk_testing_testbed.json
+++ b/adev/src/content/cdk/cdk_testing_testbed.json
@@ -6,7 +6,6 @@
   "entries": [
     {
       "name": "TestbedHarnessEnvironmentOptions",
-      "isAbstract": false,
       "entryType": "interface",
       "members": [
         {
@@ -22,6 +21,7 @@
       "description": "Options to configure the environment.",
       "jsdocTags": [],
       "rawComment": "/** Options to configure the environment. */",
+      "extends": [],
       "implements": [],
       "source": {
         "filePath": "/src/cdk/testing/testbed/testbed-harness-environment.ts",