Access to PhotoScan.DepthMap

[callahb]

I'd like access to the DepthMaps for a chunk but can't figure out how to retrieve/call them.  The API doc says:

class PhotoScan.DepthMaps
A set of depth maps generated for a chunk frame.

but trying to call chunk.DepthMaps returns an error:
AttributeError: 'PhotoScan.Chunk' object has no attribute 'DepthMaps'

[callahb]

Duh. Found it:

chunk.depth_maps