LinkedMultiValueMap.opApply

Undocumented in source. Be warned that the author may not have intended to support it.
  1. int opApply(int delegate(ref K, ref List!(V)) dg)
  2. int opApply(int delegate(MapEntry!(K, List!(V)) entry) dg)
    class LinkedMultiValueMap(K, V)
    int
    opApply
    (
    scope int delegate
    ()
    dg
    )

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