Auto-generated code for 8.x (#2412)

Co-authored-by: Josh Mock <joshua.mock@elastic.co>

docs/doc_examples/8b8b6aac2111b2d8b93758ac737e6543.asciidoc

@@ -0,0 +1,31 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.indices.create({
+  index: "idx_keep",
+  settings: {
+    index: {
+      mapping: {
+        source: {
+          mode: "synthetic",
+        },
+      },
+    },
+  },
+  mappings: {
+    properties: {
+      path: {
+        type: "object",
+        synthetic_source_keep: "all",
+      },
+      ids: {
+        type: "integer",
+        synthetic_source_keep: "arrays",
+      },
+    },
+  },
+});
+console.log(response);
+----