When using transforms, is it correct to

return undefined

when not matching the transform condition?? would this clear up the custom resource options for example?

The docs suggest that you should return undefined if the resource is not to be transformed, though tbh I normally return args

transforms: [
  args => {
    if (blah) {
      // make changes to args.props and args.opts
    }
    return args
  }
]

thanks! I will try with both