module Datadog::Tracing::Contrib::HTTP::Instrumentation

def self.after_request(&block)

Span hook invoked after request is completed. 
def self.after_request(&block)
  if block
    # Set hook
    @after_request = block
  else
    # Get hook
    @after_request ||= nil
  end
end

def self.included(base) 

def self.included(base)
  base.prepend(InstanceMethods)
end