how to add a request body parameter to an operation

[jmls]

This isn't a bug - I'm trying to figure out how to add a request body parameter to an operation

I have an openapi spec file, but one of the operations does not have a body parameter for a POST and I was trying to be smart and add it in processing the json with kin

A cunning and daring plan. With 2 small flaws

a) I don't know Go
b) I don't know Go

I have tried to work my way through tests, sample code and even lowered myself to use Gemini and Chat Gtp (bloody useless) so I am throwing myself at the mercy of this community

the payload is a json object with any number of keys and a value

{"foo":"bar","baz":"abc"}

etc

I have got so far

func addBodyParameter(operation *openapi3.Operation) {
	payloadSchema := &openapi3.SchemaRef{Value: &openapi3.Schema{Type: &openapi3.Types{"object"},
		AdditionalProperties: &openapi3.Schema{Type: &openapi3.Types{"string"}},
	}}

	mediaType := &openapi3.MediaType{
		Schema: payloadSchema,
	}


	requestBody := &openapi3.RequestBody{
		Required: true,
		Content: openapi3.Content{
			"application/json": mediaType,
		},
	}

	operation.RequestBody = &openapi3.RequestBodyRef{
		Value: requestBody,
	}

	log.Println("xx", payloadSchema)
}

	for path, pathItem := range doc.Paths.Map() { // doc.Paths is of type *openapi3.Paths

		for _, operation := range []*openapi3.Operation{
			pathItem.Get, pathItem.Post, pathItem.Put, pathItem.Delete, pathItem.Patch,
		} {
				if operation.OperationID == "cubbyhole-write" {
					addBodyParameter(operation)

				}

I think that I just can;t find the right syntax for payloadSchema

Would appreciate any help