code: @Override
    public String ltrim(final byte[] key, final long start, final long stop) {
      checkIsInMultiOrPipeline();
      client.ltrim(key, start, stop);
      return client.getStatusCodeReply();
    }
docs: Trim an existing list so that it will contain only the specified range of elements specified.
  Start and end are zero-based indexes. 0 is the first element of the list (the list head), 1 the
  next element and so on.
  <p>
  For example LTRIM foobar 0 2 will modify the list stored at foobar key so that only the first
  three elements of the list will remain.
  <p>
  start and end can also be negative numbers indicating offsets from the end of the list. For
  example -1 is the last element of the list, -2 the penultimate element and so on.
  <p>
  Indexes out of range will not produce an error: if start is over the end of the list, or start
  &gt; end, an empty list is left as value. If end over the end of the list Redis will threat it
  just like the last element of the list.
  <p>
  Hint: the obvious use of LTRIM is together with LPUSH/RPUSH. For example:
  <p>
  {@code lpush("mylist", "someelement"); ltrim("mylist", 0, 99); * }
  <p>
  The above two commands will push elements in the list taking care that the list will not grow
  without limits. This is very useful when using Redis to store logs for example. It is important
  to note that when used in this way LTRIM is an O(1) operation because in the average case just
  one element is removed from the tail of the list.
  <p>
  Time complexity: O(n) (with n being len of list - len of range)
  @param key
  @param start
  @param stop
  @return Status code reply