Required files
mongoid/matchers/default
mongoid/matchers/all
mongoid/matchers/and
mongoid/matchers/exists
mongoid/matchers/gt
mongoid/matchers/gte
mongoid/matchers/in
mongoid/matchers/lt
mongoid/matchers/lte
mongoid/matchers/ne
mongoid/matchers/nin
mongoid/matchers/or
mongoid/matchers/size