This method is deprecated or moved on the latest stable version. The last existing version (v4.0.2) is shown here.
namespace(path, options = {})
See ActionDispatch::Routing::Mapper::Scoping#namespace
# File actionpack/lib/action_dispatch/routing/mapper.rb, line 1351 def namespace(path, options = {}) if resource_scope? nested { super } else super end end