See:
http://docs.webplatform.org/wiki/apis/css-regions/Region/getRegionFlowRanges

...which displays this text under "Return Value":

 Returns an object of type function.

 Returns a series of Range objects that represent the fragments of DOM content that currently flow into the region.

The first "Returns" is auto-generated based on the interface member's identity as a method, and the second is content I wrote.  I'd think the reader only wants the return value of obj.method(). The fact that obj.method returns a reference to the function seems pointlessly obvious.  You shouldn't have to write the content pedantically as "When called as a method, returns..."