Added/updated snippets for docs (#2318)

docs/doc_examples/150b5fee5678bf8cdf0932da73eada80.asciidoc

@@ -0,0 +1,35 @@
+// 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.nodes.stats({
+  metric: "indices",
+  index_metric: "fielddata",
+  fields: "field1,field2",
+});
+console.log(response);
+
+const response1 = await client.nodes.stats({
+  metric: "indices",
+  index_metric: "fielddata",
+  level: "indices",
+  fields: "field1,field2",
+});
+console.log(response1);
+
+const response2 = await client.nodes.stats({
+  metric: "indices",
+  index_metric: "fielddata",
+  level: "shards",
+  fields: "field1,field2",
+});
+console.log(response2);
+
+const response3 = await client.nodes.stats({
+  metric: "indices",
+  index_metric: "fielddata",
+  fields: "field*",
+});
+console.log(response3);
+----