in fc/function.go [163:171]
func (fn *Function) invokeEventFunc(invokeContext context.Context, reqPayload []byte, response *messages.InvokeResponse) error {
respPayload, err := fn.handler.Invoke(invokeContext, reqPayload)
if err != nil {
response.Error = fcErrorResponse(err)
return nil
}
response.Payload = respPayload
return nil
}