example_app_generator/no_active_record/lib/rails/generators/in_memory/model/templates/model.rb.erb
<% module_namespacing do -%>
class <%= class_name %> < <%= options[:parent].try(:classify) || 'InMemory::Model' %>
<% attributes.each do |attribute| -%>
attr_accessor :<%= attribute.name %>
<% end -%>
end
<% end -%>