```ruby
require 'rubygems'
require 'activesupport'
require 'nokogiri'

require 'uri'

require 'active_api/builder'
require 'active_api/has_definition'
require 'active_api/collection'
require 'active_api/complex_type'
require 'active_api/simple_type'
require 'active_api/field'
require 'active_api/schema'
require 'active_api/definition'
```

Stop requiring rubygems, for those folks who don't use it
user
```ruby
require 'active_support'
require 'nokogiri'
require 'uri'

require 'active_api/builder'
require 'active_api/has_definition'
require 'active_api/collection'
require 'active_api/complex_type'
require 'active_api/simple_type'
require 'active_api/field'
require 'active_api/schema'
require 'active_api/definition'
```
assistant