In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Images are now stored
self-contained, and no longer use a parent-chain, making this field
an equivalent of the Size field.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Let clients choose object types to compute disk usage of.
Signed-off-by: Roman Volosatovs <roman.volosatovs@docker.com>
Co-authored-by: Sebastiaan van Stijn <github@gone.nl>