openlayers/ol3 — pull request #1552 by twpayne (2014-01-20 11:31:42+00:00)
Title: Export ol.source.Vector#getExtent

As requested by @bartvde in #1259.

Note that `ol.source.Vector#getExtent` is implemented here: https://github.com/openlayers/ol3/blob/master/src/ol/source/vectorsource.js#L268-273