Custom Queries doc might be wrong

[Tryanium]

Describe the content issue:
Hi Team! I'm trying to use the Custom Queries, to make BatchPut on Dynamo, I've followed the example in the doc: https://docs.amplify.aws/flutter/build-a-backend/data/custom-business-logic/batch-ddb-operations/
At the end of the example

const { data, errors } = await client.mutations.BatchCreatePost({
  contents: ['Post 1', 'Post 2', 'Post 3']
});

There is a client, but for the rest of examples there is no "client" it's only

final request = ModelMutations.create(todo);
final response = await Amplify.API.mutate(request: request).response;

this seems to be a Typescript example in the flutter section.

URL page where content issue is:
https://docs.amplify.aws/flutter/build-a-backend/data/custom-business-logic/batch-ddb-operations/

[Tryanium]

@salihgueler Tag for investigating

[jjarvisp]

Hey @Tryanium, thanks for opening this issue! We appreciate you pointing this out; we'll look into the best way to close this gap and get a Flutter example added to this section.