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   1 # http\Message http\Message::toCallback(callable $callback[, int $offset = 0[, int $maxlen = 0]])
   2
   3 Stream the message through a callback.
   4
   5 ## Params:
   6
   7 * callable $callback
   8   The callback of the form function(http\Message $from, string $data).
   9 * Optional int $offset = 0
  10   Start to stream from this offset.
  11 * Optional int $maxlen = 0
  12   Stream at most $maxlen bytes, or all if $maxlen is less than 1.
  13
  14 ## Returns:
  15
  16 * http\Message, self.