include ImplictRender. This dependency is necessary to work with JBuilde...

...r view templates.

Jbuilder is very usefull when we want to offer JSON return type from our app. Today using rails-api to create a simple REST/JSON Api was necessary to include this dependecy, ActionController::ImplicitRender, inside my controller .

Follow the sample code:
```ruby
module Api
	module V1
		class CostumersController < ActionController::API
		include ActionController::ImplicitRender

		before_filter :fetch_costumer, :except => [:index]

		def fetch_costumer
		  @costumer = Costumer.find_by_id(params[:id])
		end

		def index
			@costumers = Costumer.all
		end	

		def show
		 @costumer
		end 	

		# Never trust parameters from the scary internet, only allow the white list through.
		def costumer_params
		  params.require(:costumer).permit(:id)
		end

		end
	end
```
end