module Middleman::CoreExtensions::Features::ClassMethods

def activate(feature)

activate MyFeatureModule

Alternatively, you can pass in a Middleman feature module directly.

activate :lorem

feature module and includes it.
It takes a underscore-separated symbol, finds the appropriate
This method is available in the project's `config.rb`. 
def activate(feature)
  if feature.is_a? Symbol
    feature = feature.to_s 
  end
  if feature.is_a? String
    feature = feature.camelize
    feature = Middleman::Features.const_get(feature)
  end
  
  $stderr.puts "== Activating:  #{feature}" if logging?
  register feature
end