class Grape::API

def configure

`configuration` as normal.
The configuration set here is accessible from inside an API with
API. If no block is given, returns the configuration hash.
configuration hash to the block which you can use to configure your
Configure an API from the outside. If a block is given, it'll pass a 
def configure
  config = @base_instance.configuration
  if block_given?
    yield config
    self
  else
    config
  end
end