The prefix a relocated surface is keyed under — userSurfaceRoot when the
harness has a second home for its surfaces, "" when the surfaces carry
their own prefix and a file-map key equals the on-disk path.
One line, named, because it used to be a FIELD (materializeRoot) and the
only thing that kept it equal to userSurfaceRoot was that nobody had
written a layout where they differed.
The prefix a relocated surface is keyed under —
userSurfaceRootwhen the harness has a second home for its surfaces,""when the surfaces carry their own prefix and a file-map key equals the on-disk path.One line, named, because it used to be a FIELD (
materializeRoot) and the only thing that kept it equal touserSurfaceRootwas that nobody had written a layout where they differed.