DList.insertBefore

Undocumented in source. Be warned that the author may not have intended to support it.
  1. DListNode!(T)* insertBefore(T data, DListNode!(T)* ins)
    class DList(T)
    insertBefore
    (,)
  2. void insertBefore(DListNode!(T)* node, DListNode!(T)* ins)

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