cckellogg commented on issue #69: [ISSUE #68][feat]add Option config for init 
(#68)
URL: https://github.com/apache/pulsar-client-go/pull/69#issuecomment-550092565
 
 
   I've seen this patten in some other places for example helm 
https://github.com/helm/helm/blob/master/internal/experimental/registry/client.go
 and https://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis. 
The main thing in these implementations are the config functions are scoped 
into their own package. This patch seems to be mixing config functions for 
three different configs with the same package. This is confusing to me. 
   
   One option would be to prefix everything to make it clear which config it 
belongs to.
   ConsumerOptionsTopic()
   ConsumerOptionsAckTimeout(1000)
   Subscribe(name string, ConsuerOptionTopic(), ConsumerOptionsAckTimeout()) 
   
   
   However this could quickly become more verbose than the standard way.
   
   opts := ConsumerOptions{
   topic: "my-topic",
   ack: 1000,
   }
   Subscribe(name string,  opts) 
   
   Thoughts?
   
   

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