You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: fsm.rb
    path of file: ./repos/webmachine-ruby/lib/webmachine/trace
    
    the code of the file until where you have to start completion: module Webmachine
  module Trace
    # This module is injected into {Webmachine::Decision::FSM} when
    # tracing is enabled for a resource, enabling the capturing of
    # traces.
    module FSM
      # Overrides the default resource acce
    
      def trace_response_body(body)
        case body
        when Streaming::FiberEncoder
          # TODO: figure out how to properly rewind or replay the
          # fiber
          body.inspect
        when Streaming::EnumerableEncoder
          body.body.join
        when Streaming::CallableEncoder
          body.body.call.to_s
        when Streaming::IOEncoder
          body.body.inspect
        else
          body.to_s
        end