# duplicate tags are now forbidden, so we can't allow values
# in the hash to be overwritten.
# duplicate tags are now forbidden, so we can't allow values
# in the hash to be overwritten.
# bounding box, only the tags of the changeset.
def update_from(other, user)
# ensure that only the user who opened the changeset may modify it.
# bounding box, only the tags of the changeset.
def update_from(other, user)
# ensure that only the user who opened the changeset may modify it.