MIME: custom_types --> 'ro'
Time: all attributes --> 'ro'
(seconds, epoch, gmt_string, expression)
session: data --> 'ro'
Role/Template: default_tmpl_ext --> 'ro'
error: some attributes --> 'ro'
(title, message, exception)
Update changes
Merge branch 'mickeyn-mickey/more_attributes_to_ro'