borisyankov/DefinitelyTyped — pull request #1144 by jtamayo (2013-10-16 03:07:16+00:00)
Title: Add missing 'get' from Selection.datum

From D3's doc [*] "If value is not specified, [datum] returns the bound datum for the first non-null element in the selection. This is generally useful only if you know the selection contains exactly one element."

[*] https://github.com/mbostock/d3/wiki/Selections#wiki-datum