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``properties_iter::ffi``
========================
.. js:class:: CodePointRangeIterator
An iterator over code point ranges, produced by ``ICU4XCodePointSetData`` or one of the ``ICU4XCodePointMapData`` types
.. js:method:: next()
Advance the iterator by one and return the next range.
If the iterator is out of items, ``done`` will be true
.. js:class:: CodePointRangeIteratorResult
Result of a single iteration of :js:class:`CodePointRangeIterator`. Logically can be considered to be an ``Option<RangeInclusive<u32>>``,
``start`` and ``end`` represent an inclusive range of code points start, end, and ``done`` will be true if the iterator has already finished. The last contentful iteration will NOT produce a range done=true, in other words ``start`` and ``end`` are useful values if and only if ``done=false``.
.. js:attribute:: start
.. js:attribute:: end
.. js:attribute:: done
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