https://api.rubyonrails.org/classes/ActiveSupport/Configurable.html
which adds a config method to the class which can store some configuration.
class Example
include ActiveSupport::Configurable
end
Example.configure do |config|
config.some_option = 'value'
end
# or
Example.config.some_option = 'value'
# fetch option
Example.config.some_option #=> "value"