[BUG] code generation PHP generates duplicate function names for operationID

Bug Report Checklist

I have the following snippet in my .yaml file for my api. I am generating a php client and I get duplicate function names

public function addCustomer($customer = null, $image = null)
public function addCustomer($body)

This is not allowed in php and generates a syntax error. How can I have an operating type per request type?

yaml operation id addCustomer

  summary: Add a new customer to the store
  operationId: addCustomer
  requestBody:
    content:
      application/json:
        schema:
          $ref: '#/components/schemas/NewCustomerWithImageUrl'
      multipart/form-data:
        schema:
          $ref: '#/components/schemas/NewCustomerWithImage'
    description: Customer object that needs to be added to the store
    required: true

Start with the supplied OpenAPI YAML, especially the addCustomer operationId and its JSON and multipart request bodies, then reproduce the generated PHP client output. Trace how those request variants become methods; done means the PHP client no longer contains duplicate addCustomer function names and generates valid syntax.