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  ;; define two variables then set *warn-on-reflection* to true and try to call
  ;; one of their Java methods. Warnings are generated in both cases
  ;; set *warn-on-reflection* to false and note that you can call both functions
  ;; without a warning
  
  user=> (def i 23)
  #'user/i
  user=> (def s "123")
  #'user/s
  user=> (set! *warn-on-reflection* true)
  true
  user=> (.toString i)
  Reflection warning, NO_SOURCE_PATH:4 - reference to field toString can't be resolved.
  "23"
  user=> (.toString s)
  Reflection warning, NO_SOURCE_PATH:5 - reference to field toString can't be resolved.
  "123"
  user=> (set! *warn-on-reflection* false)
  false
  user=> (.toString i)
  "23"
  user=> (.toString s)
  "123"
  user=>

  ;; define two variables then set *warn-on-reflection* to true and try to call ;; one of their Java methods. Warnings are generated in both cases ;; set *warn-on-reflection* to false and note that you can call both functions ;; without a warning user=> (def i 23) #'user/i user=> (def s "123") #'user/s user=> (set! *warn-on-reflection* true) true user=> (.toString i) Reflection warning, NO_SOURCE_PATH:4 - reference to field toString can't be resolved. "23" user=> (.toString s) Reflection warning, NO_SOURCE_PATH:5 - reference to field toString can't be resolved. "123" user=> (set! *warn-on-reflection* false) false user=> (.toString i) "23" user=> (.toString s) "123" user=>